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Definition: Unit |
UnitNoun1. Any division of quantity accepted as a standard of measurement or exchange; "the dollar is the United States unit of currency"; "a unit of wheat is a bushel"; "change per unit volume". 2. An individual or group or structure or other entity regarded as a structural or functional constituent of a whole; "the reduced the number of units and installations"; "the word is a basic linguistic unit". 3. An organization regarded as part of a larger social group; "the coach said the offensive unit did a good job"; "after the battle the soldier had trouble rejoining his unit". 4. A single undivided whole; "an idea is not a unit that can be moved from one brain to another". 5. Instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity; "he bought a new stereo system"; "the unit consists of a motor and a small computer". 6. A single undivided natural entity occurring in the composition of something else; "units of nucleic acids". 7. An assemblage of parts that is regarded as a single entity; "how big is that part compared to the whole?"; "the repairman simply replaced the unit". Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved. |
Date "unit" was first used in popular English literature: sometime before 1321. (references) |
Note: Unit \U"nit\, noun. [Abbreviation from unity.]. (references) |
| Domain | Definition |
Medicine | E. g. "Administration and support services" Source: European Union. (references) |
Metallurgy | Any piece of material which is about to undergo, is undergoing, or has just undergone, a manufacturing operation. The term "unit", instead of "piece", can be used in counting(as in "construction in single units"). Source: European Union. (references) |
Meteorology & Standards | An object on which a measurement or observation may be made. Source: European Union. (references) |
Military & Defense | A standard or basic quantity into which an item of supply is divided, issued, or used. Source: European Union. (references) |
Mining | Smelter contracts make frequent use of the work unit. A unit means 1%. Since a short ton contains 2,000 lb (907.2 kg), a unit is equivalent to 20lb/t (10.0 kg/t) of ore. (references) |
Public Administration | Basic measure used in calculating the amount of credit to be assigned to any particular course(1). Certification that a particular course of study has been passed(2). Source: European Union. (references) |
| General tactical term for a fire-service crew. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | |
(From Wikipedia, the free Encyclopedia)
Ring theory is the branch of mathematics in which rings are studied: that is, structures supporting both an addition and a multiplication operation. This is a glossary of some terms of the subject.
Definition of a ring
A ring is an abelian group (R,+) together with an associative operation * which is distributive over + and has an identity element 1 with respect to *. The operation + is referred as the addition and * is referred as the multiplication. The identity element with respect to + is written as 0.
;Characteristic : The characteristic of a ring is the smallest positive integer n satisfying n1=0 if it exists and 0 otherwise. In particular ne=0 for all elements e of the ring.
Types of elements
; Idempotent : An element e of a ring is idempotent if e2 = e.
; Central : An element r of a ring R is central if xr = rx for all x in R. The set of all central elements forms a subring of R, known as the center of R.
; Nilpotent : An element r of R is nilpotent if there exists a positive integer n such that rn = 0.
; Unit or invertible element : An element r of the ring R is a unit if there exists an element r-1 such that rr-1=r-1r=1. This element r-1 is uniquely determined by r and is called the multiplicative inverse of r. The set of units forms a group under multiplication.
; Zero divisor : A nonzero element r of R is said to be a zero divisor if there exists s ≠ 0 such that sr=0 or rs=0. Zero divisors are never units.
Homomorphisms and ideals
; Factor ring : Given a ring R and an ideal I of R, the factor ring is the set R/I of cosets {a+I : a∈R} together with operations (a+I)+(b+I)=(a+b)+I and (a+I)*(b+I)=ab+I. The relationship between ideals, homomorphisms, and factor rings is summed up in the fundamental theorem on homomorphisms.
; Finitely generated ideal : A left ideal I is finitely generated if there exist finitely many elements a1,...,an such that I = Ra1 + ... + Ran. A right ideal I is finitely generated if there exist finitely many elements a1,...,an such that I = a1R + ... + anR. A two-sided ideal I is finitely generated if there exist finitely many elements a1,...,an such that I = Ra1R + ... + RanR.
; Ideal : A left ideal I of R is a subgroup or (R,+) such that aI ⊆ I for all a∈R. A right ideal is a subgroup of (R,+) such that Ia⊆I for all a∈R. An ideal (sometimes for emphasis: a two-sided ideal) is a subgroup which is both a left ideal and a right ideal.
; Jacobson radical : The intersection of all maximal left ideals in a ring forms a two-sided ideal, the Jacobson radical of the ring.
; Kernel of a ring homomorphism : It is the preimage of 0 in the codomain of a ring homomorphism. Every ideal is the kernel of a ring homomorphism and vice versa.
; Maximal ideal : A left ideal of the ring R which is not contained in any other left ideal but R itself is called a maximal left ideal. Maximal right ideals are defined similarly. In commutative rings, there is no difference, and one speaks simply of maximal ideals.
; Nilradical : The set of all nilpotent elements in a commutative ring forms an ideal, the nilradical of the ring. The nilradical is equal to the intersection of all the maximal ideals, and also equal to the intersection of all the prime ideals.
; Prime ideal : An ideal P in a commutative ring R is prime if P ≠ R and if for all a and b in R with ab in P, we have a in P or b in P. Every maximal ideal in a commutative ring is prime.
; Principal ideal : a principal left ideal in the ring R is a left ideal of the form Ra for some element a of R; a principal right ideal is a right ideal of the form aR for some element a of R; a principal ideal is a two-sided ideal of the form RaR for some element a of R''.
; Radical of an ideal : The radical of an ideal I in a commutative ring consists of all those ring elements a power of which lies in I. It is equal to the intersection of all maximal ideals containing I.
; Ring homomorphism : A function f : R → S between rings (R,+,*) and (S,⊕,×) is a ring homomorphism if it has the special properties that
; Ring isomorphism : A ring homomorphism that is bijective is a ring isomorphism. The inverse of an isomorphism, it turns out, is also a ring homomorphism. Two rings are isomorphic if there exists a ring isomorphism between them. Isomorphic rings can be thought as essentially the same, only with different labels on the individual elements.
- f(a + b) = f(a) ⊕ f(b)
- f(a * b) = f(a) × f(b)
- f(1) = 1
- for any elements a and b of R.
Types of rings
; Artinian ring : A ring satisfying the descending chain condition for left ideals is left artinian; if it satisfies the descending chain condition for right ideals, it is right artinian; if it is both left and right artinian, it is called artinian''. Commutative artinian rings are noetherian.
; Boolean ring : A ring in which every element is idempotent is a boolean ring.
; Commutative ring : A ring R is commutative if the multiplication is commutative, i.e. rs=sr for all r,s∈R.
; Dedekind domain :
; Division ring or skew field : A ring in which every nonzero element is a unit and 1≠0 is a division ring.
; Euclidean domain : An integral domain in which a degree function is defined so that "division with remainder" can be carried out is called a Euclidean domain (because the Euclidean algorithm works in these rings). All Euclidean domains are principal ideal domains.
; Field : A commutative division ring is a field. Every finite division ring is a field, as is every finite integral domain. Field theory is indeed an older branch of mathematics than ring theory.
; Integral domain : A commutative ring without zero divisors and in which 1≠0 is an integral domain.
; Local ring : A ring with a unique maximal left ideal is a local ring. These rings also have a unique maximal right ideal, and the left and the right unique maximal ideals coincide.
; Noetherian ring : A ring satisfying the ascending chain condition for left ideals is left noetherian; a ring satisfying the ascending chain condition for right ideals is right noetherian; a ring that is both left and right noetherian is noetherian. A ring is left noetherian if and only if all its left ideals are finitely generated; analogously for right noetherian rings.
; Semi-simple ring :
; Simple ring :
; Unique factorization domain :
; Principal ideal domain : An integral domain in which every ideal is principal is a principal ideal domain. All principal ideal domains are unique factorization domains.
Miscellaneous
; Direct product and direct sums : These are ways to construct new rings from given ones; please refer to the corresponding links for explanation.
; Krull dimension of a commutative ring : The maximal length of a strictly increasing chain of prime ideals in the ring.
; Localization of a ring : A technique to turn a given set of elements of a ring into units in a "best possible" way.
; Subring : A subset S of the ring (R,*,+) which remains a ring when + and * are restricted to S and contains the multiplicative identity 1 of R is called a subring of R.
; Rig : A rig is an algebraic structure satisfying the same properties as a ring, except that addition need only be an abelian monoid operation, rather than an abelian group. The term "rig" is meant to suggest that it is a "ring" without "n"egatives.
; Rng : A rng is an algebraic structure satisfying the same properties as a ring, except that multiplication need not have an identity element. The term "rng" is meant to suggest that it is a "ring" without an "i"dentity.
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Glossary of ring theory."
(From Wikipedia, the free Encyclopedia)
In physics and metrology, units are standards for measurement of physical quantities that need clear definitions to be useful. Reproducibility of experimental results is central to the scientific method. To facilitate this we need standards, and to get convenient measures of the standards we need a system of units. Scientific systems of units are a formalization of the concept of weights and measures, initially developed for commercial purposes.
Different systems of units are based on different choices of a set of fundamental units. The most widely used system of units is the international system, or SI system, of units derived from the seven SI base units. All other SI units can be derived from these base units.
Other systems of units that have been used for various purposes include:
- the centimeter-gram-second system of units
- the Planck units
- U.S. customary units
- Imperial units
- Chinese unit
Units as dimensions
Any value of a physical quantity is expressed as a comparison to a unit of that quantity. For example, the value of a physical quantity Q is written as the product of a unit [Q] and a numerical factor:
The multiplication sign is usually left out, just as it is left out between variables in scientific notation of formulas. In formulas the unit [Q] can be treated as if it was a kind of physical dimension: see dimensional analysis for more on this treatment.
- Q = n * [Q] = n [Q]
A distinction should be made between units and standards. A unit is fixed by its definition, and is independent of physical conditions such as temperature. By contrast, a standard is a physical realization of a unit, and realizes that unit only under certain physical conditions. For example, the metre is a unit, while a metal bar is a standard. One metre is the same length regardless of temperature, but a metal bar will be one metre long only at a certain temperature.
Basic and derived units
For most quantities a unit is absolutely necessary to communicate values of that physical quantity. Try for example to tell someone the value of a length without the use of a unit. That is not possible because you can't verbally describe a length.
But not all quantities require a unit of their own. Using physical laws, units of quantities can be expressed as combinations of units of other quantities. Thus only a small set of units is required. These units are taken as the basic units. Other units are derived units. Derived units are a matter of convenience, as they can be expressed in terms of basic units. Which units are considered basic is a matter of choice.
The basic units of SI are actually not the smallest set. Smaller sets have been defined. There are sets in which the electric and magnetic field have the same unit. This is based on physical laws that show that electric and magnetic field are actually different manifestations of the same phenomenon. In some fields of science such systems of units are highly favored over the SI system.
Conversion of units
Conversion of units involves comparison of different standard physical values, either of a single physical quantity or of a physical quantity and a combination of other physical quantities.
Thus conversion factors between units are always imprecise to some level and improved values may be found when a more precise comparison is performed.
Prefixes in the SI system
In the SI system some letters denoting conveniently chosen numerical values can be used as prefixes to any of the units.
For example, c = 0.01, and thus cm = 0.01 * m and cN = 0.01 * N
There is one exception: for historical reasons, the unit of mass, kg, already contains a prefix and prefixes are not to be added to it but to g. Thus: mg and not µkg (with "µ" = "micro-"). To many this is a source of mistakes and frustration; see Talk.
Use of prefixes does not involve any unit conversion, as the prefixes are just defined as numerical values. They can not be imprecise.
For example, the expressions 'cm' and '0.01 m' mean mathematically exactly the same thing. It is not a unit conversion, just a mathematical conversion, just like '4 * 5' and '20' are mathematical expressions with the same meaning.
Calculations with units
Hints:
- Use formulas involving physical values whenever possible, be reluctant to split up physical values into units and numerical values, as you increase the complexity by a factor of two!
- If you calculate the value of a physical quantity A from a formula involving a combination of other physical quantities (B, C, D), you don't have to calculate the resulting unit: if you just convert all values of B, C, D so as to be expressed in SI units (no prefixes), the resulting unit is the SI unit of the quantity A. The SI system is set up to ensure this convenience. Don't use the gram instead of the kilogram, because naturally that will not work!
- Don't let definitions like density is mass per unit volume obscure your understanding of units. It sounds as if it says:
This is not true. The correct statement is that density is mass divided by volume:
- D = m / [V] (WRONG)
The sentence `density is mass per unit volume' uses another way of perceiving the concept. It says that the density D_s of system s is the mass m_u of a subsystem u of s, divided by the volume V_u of subsystem u, given that the volume of subsystem u is unit volume:
- D = m / V
- D_s = m_u / V_u
- V_u = 1 [V]
Mathematical rules for calculations with units follow from the formula for physical values, Q = n * [Q]
- Values of the same quantity can of course always be added, but not by just adding their numerical values. The numerical value is not all of the value of the physical quantity.
The units in the physical values have to be converted so that they are the same. Then the numerical values can be added. The same principle is known from adding fractions: you have to make the denominators the same and then you can add the numerators.
- When a unit is divided by itself, the division yields a unitless 1.
- When two different units are multiplied by each other, the result is a new unit. For instance, in SI, the unit of momentum is one kilogram multiplied by one meter divided by one second. See also dimensional analysis.
- Expressing a physical value in terms of another unit:
Starting with:
just replace the origional unit [Q]_i with its meaning in terms of the desired unit [Q]_f, e.g. if [Q]_i = c_ij * [Q]_f, then:
- Q = n_i * [Q]_i
Now n_i and c_ij are both numerical values, so just calculate their product.
- Q = n_i * c_ij * [Q]_f
Or, which is just mathematically the same thing, multiply Q by unity, the product is still Q:
For example, you have an expression for a physical value Q involving the unit feet per second ([Q]_i) and you want it in terms of the unit miles per hour ([Q]_f):
- Q = n_i * [Q]_i * ( c_ij * [Q]_f/[Q]_i )
- Find facts relating the original unit to the desired unit:
- 1 mile = 5280 feet and 1 hour = 3600 seconds
- Next use the above equations to construct a fraction that has a value of unity and that contains units such that, when it is multiplied with the original physical value, will cancel the original units:
- 1 = (1 mile) / (5280 feet) and 1 = (3600 seconds) / (1 hour)
- Last, multiply the original expression of the physical value by the fraction, called a conversion factor, to obtain the same physical value expressed in terms of a different unit. Note: since the conversion factors have a numerical value of unity, multiplying any physical value by them will not change that value.
See also: units unit conversion computer program
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Physical unit."
(From Wikipedia, the free Encyclopedia)
SI derived units are part of the SI system of measurement units and are derived from the seven SI base units.
Physical quantity Name of SI unit Symbol for SI unit Expression in terms of [[SI base unit|SI base units]]
Special names and Symbols
frequency hertz Hz
force newton N
pressure, stress pascal Pa
energy, work, heat joule J
power, radiant flux watt W
electric charge coulomb C
electric potential, electromotive force volt V
electrical resistance ohm Ω
electric conductance siemens S
electric capacitance farad F
magnetic flux density, magnetic inductivity tesla T
magnetic flux weber Wb
inductance henry H
temperature degree Celsius °C K
plane angle radian rad 1 = m·m-1
solid angle steradian sr 1 = m2·m-2
luminous flux lumen lm cd·sr
illuminance lux lx cd·sr·m-2
activity (radioactive) becquerel Bq s-1
absorbed dose (of radiation) gray Gy J·kg-1 = m2·s-2
dose equivalent (dose equivalent index) sievert Sv J·kg-1 = m2·s-2
catalytic activity katal kat mol·s-1
Other Quantities
area m2
volume m3
speed, velocity m·s-1
angular velocity s-1, rad·s-1
acceleration m·s-2
moment of force N·m = m2·kg·s-2
wavenumber m-1
density, mass density kg·m-3
specific volume m3·kg-1
amount (-of-substance) concentration mol·m-3
molar volume m3·mol-1
heat capacity, entropy J·K-1 = m2·kg·s-2·K-1
molar heat capacity, molar entropy J·K-1·mol-1 = m2·kg·s-2·K-1·mol-1
specific heat capacity, specific entropy J·K-1·kg-1 = m2·s-2·K-1
molar energy J·mol-1 = m2·kg·s-2·mol-1
specific energy J·kg-1 = m2·s-2
energy density J·m-3 = m-1·kg·s-2
surface tension N·m-1=J·m-2 = kg·s-2
heat flux density, irradiance W·m-2 = kg·s-3
thermal conductivity W·m-1·K-1 = m·kg·s-3·K-1
kinematic viscosity, diffusion coefficient m2·s-1
dynamic viscosity N·s·m-2 = Pa·s = m-1·kg·s-1
electric charge density C·m-3 m-3·s·A
electric current density A·m-2
conductivity S·m-1 = m-3·kg-1·s3·A 2
molar conductivity S·m2·mol-1 = kg-1·mol-1·s3·A 2
permittivity F·m-1 = m-3·kg-1·s4·A 2;
permeability H·m-1 = m·kg·s-2·A-2
electric field strength V·m-1 = m·kg·s-3·A-1
magnetic field strength A·m-1
luminance cd·m-2
exposure (X and gamma rays) C·kg-1 = kg-1·s·A
absorbed dose rate Gy·s-1 = m2·s-3 References:
- I. Mills, Tomislav Cvitas, Klaus Homann, Nikola Kallay, IUPAC: Quantities, Units and Symbols in Physical Chemistry, 2nd edition (June 1993), Blackwell Science Inc (p. 72)
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "SI derived unit."
(From Wikipedia, the free Encyclopedia)
A SI unit is a unit of measurement according to the International System of Units SI. There are seven base units and several derived units. Non-SI units can be converted to SI units (or vice versa) according to the conversion of units.
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "SI unit."
(From Wikipedia, the free Encyclopedia)
The word unit can mean more than one thing:
- In most physical contexts, 'unit' is used to mean a physical unit.
- A currency is a unit of money (a monetary unit).
- In mathematics, 'unit' often refers to the number one in some sense:
- A unit vector is a vector with length 1.
- The unit circle is the cirle with radius 1 centered at the origin of the coordinate system.
- The unit interval is the interval of all real numbers between 0 and 1.
- The imaginary unit of complex numbers is the number i, a number whose square is -1.
- A root of unity is a complex number a power of which is 1.
- A unit of a ring is an element of the ring that is invertible with respect to the ring multiplication.
- Military units:
- Unit 101 was an Israeli special operations unit.
- Unit 731 was a secret military unit of the Japanese army.
- Functional units are components of a system that perform a specific function:
- The Central processing unit (CPU) is the processor of a computer; Arithmetic and Logical Unit, Control unit, Memory management unit and Floating Point Unit are important components of the CPU.
- A multiple unit is a passenger train whose carriages have their own motors.
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Unit."
(From Wikipedia, the free Encyclopedia)
Unity is the name of the belief system held by the members of the Association of Unity Churches. This organization's Q & A page describes Unity as having "some similarities" in historical origin and teachings to New Thought groups, including Christian Science. See List of Christian denominations.
See also
One
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Unity."
| The following table is compiled from various sources, across various languages. When English abbreviations or acronyms come from a non-English source, this is noted. | |||
| Entry | Source | Expression | Field |
| BOHR unit | English | 0.5292 10-8 cm | Chemistry, Meteorology & Standards |
Source: compiled by the editor, based on several corpora (additional references). | |||
Synonyms: UnitSynonyms: building block (n), social unit (n), system (n), unit of measurement (n), whole (n), whole thing (n). (additional references) |
| Synonym by domain: on-the-job (metallurgy). |
| Context | Synonyms within Context (source: adapted from Roget's Thesaurus). |
Heat | Calorie, gram-calorie, small calorie; kilocalorie, kilogram calorie, large calorie; British Thermal Unit, B.T.U.; therm, quad. |
Intellect | Central processing unit, CPU; arithmetic and logical unit, ALU. |
Length | Astronomical unit, AU, light-year, parsec. |
Unity | One, unit, ace; individual; none else, no other. |
| Source: adapted from Roget's Thesaurus. | |
Crosswords: Unit |
| Non-English Usage: "Unit" is also a word in the following languages with English translations in parentheses. Dutch (unit), French (unites), Romanian (associate, conjoint, conjugate, conjunct, conjunctively, connected, joint, uniat, uniate, United). |
| Domain | Usage | |
Screenplays | I just got kicked out of the unit. My flight status has been withdrawn (Hot Shots!; writing credit: Jim Abrahams; Pat Proft) I run my unit how I run my unit (A Few Good Men; writing credit: Aaron Sorkin) Yeah, they have a really good shark bite unit there (Rat Race; writing credit: Andy Breckman) Mother! Turn the cooling unit back on (Alien; writing credit: Dan O'Bannon; Ronald Shusett) You was in Wooley's unit, wasn't you (Dawn of the Dead; writing credit: George A. Romero) | |
Clever | Basic unit of laryngitis: 1 hoarsepower. (references; author: unknown) No combat ready unit has ever passed inspection. (references; author: unknown) A "jiffy" is an actual unit of time for 1 100th of a second. (references; author: unknown) | |
Movie/TV Titles | First Motion Picture Unit (1943) Special Unit 2 (2001) Unit 731: Nightmare in Manchuria (1999) Law & Order: Special Victims Unit (1999) Unit 13 (1996) | |
Song Titles | Concrete and Clay (performing artist: Unit Four Plus Two) | |
Source: compiled by the editor from various references; see credits. | ||
| Domain | Title | ||
References |
| ||
Books |
| ||
Periodicals |
| ||
Theater & Movies | |||
Music |
| ||
High Tech |
| ||
Consumer Goods | |||
Source: compiled by the editor from various references; see credits. | |||
| Thumbnail | Description & Credit | Thumbnail | Description & Credit |
 | A laminar airflow unit is a protective covering for people with suppressed immune systems. In this germ-free environment the air flows out one way and the germs cannot re-enter the system. Shown are a nurse and a child inside the protective unit. The nurse is reading to the child. Credit: Unknown photographer/artist. |  | A physician examines an infant in the intensive care unit (ICU), accompanied by the child's foster mother and various other medical staff. There are 3 different angles. See artwork: NCI-40. Credit: Bill Branson (photographer). |
 | Disaster Aid. Local citizens receive Typhoid vacinations from Dr. M.L. Fuller, Director, Laredo/Webb County Health Unit and other employees in a mass immunization program following the Rio Grande flood of 1954. Credit: CDC. |  | Pictured here is a trial run of a patient taken from CDC to a nearby medical center. A doctor is administering care to the patient with supportive help from the Isolation Unit medical staff. Credit: CDC. |
 | "Pseudo I-WP" by Alan Schoen. An approximation to a unit cell of Schoen's I-WP surface. Click on Edit inside DPGraph for extensive comments. More ... |  | "Pseudo D" by Alan Schoen. An approximation to a unit cell of Schwarz's D surface. See the comments inside "Pseudo I-WP". More ... |
 | Lunar Roving Vehicle (LRV) Qualification Unit. Credit: NASA. |  | Salmon River - summer transportation for leveling unit Level party of Ira Rubottom. Credit: Coast & Geodetic Survey Historical Image Collection. |
 | Setup for calibrating microwave navigation instruments Master unit set up across sound Calibration crew from NOAA Ship WHITING. Credit: Coast & Geodetic Survey Historical Image Collection. |  | Horseshoe crabs coming into the shallows at Flag Ponds Nature Park, a unit of Montgomery County, Maryland, public schools. Credit: America's Coastlines. |
Source: pictures compiled by the editor from various references; see picture credits. | |||
 |  |
| "Indoor air-con unit" by Simon Cataudo Commentary: "Deeply shadowed air-con unit in my studio." | "Controller" by Neil Cummins Commentary: "This unit is still in operation! It works the guiding lights for incoming ships into the locks system on the Manchester Ship Canal UK." |
Source: photographs selected by the editor, with permission from the photographers. | |
| Author | Quotation |
Kabbalah | The atom, being for all practical purposes the stable unit of the physical plane, is a constantly changing vortex of reactions. |
Source: compiled by the editor from various references. | |
| Author | Date | Quotation |
Treaty of Versailles | 1919 | The administration of this single unit will be carried on by a manager named by the Central Rhine Commission, which shall also have power to remove him. (reference) |
United Nations | 1948 | The family is the natural and fundamental group unit of society and is entitled to protection by society and the State. (reference) |
Source: compiled by the editor from various references. | ||
| Title | Author | Quote |
Grapes of Wrath | Steinbeck, John | The family became a unit. |
Source: compiled by the editor from various references. | ||
| Subject | Topic | Quote |
Health | Each glomerulus-and-tubule unit is called a nephron. (references) | |
Cell -- the smallest unit of a living organism that is capable of functioning independently. (references) | ||
Special care unit -- a long-term care facility with environmental features and/or programs designed for people with dementia. (references) | ||
Business | For 2004, experts forecast unit sales to reach over 9 million units. (references) | |
Total unit labor costs reflect well compared to other European countries. (references) | ||
All car registrations are measured as one unit, regardless of their price. (references) | ||
Children | Italy | The law established a special police unit to monitor and prosecute Internet sites devoted to promoting pedophilia. (references) |
Liechtenstein | In March a special police unit on computer crime that monitors child pornography on the Internet began operations. (references) | |
Jordan | The Unit deals primarily with child and spousal abuse, providing multiple in-house services, including medical treatment for patients. (references) | |
Civil Liberties | Chile | Military recruits, whatever their religion, are required at times to attend Catholic events involving their unit. (references) |
Philippines | The Refugee Unit in the Department of Justice determines which asylum seekers qualify as refugees; such determinations in practice implement many of the basic provisions of the 1951 U.N. Convention. (references) | |
Eritrea | In July the military detained Mathewos Habteab, the editor of the Setit, for leaving his military unit without permission; he was detained for a short period and assigned to a military unit upon release. (references) | |
Economic History | Poland | Unit costs remain competitive. (references) |
Bangladesh | Labor cost per unit is low, but so is productivity. (references) | |
Bahrain | The center also has a maternity ward and an intensive care unit. (references) | |
Human Rights | Bolivia | Candia was discharged honorably, but his unit was disciplined. (references) |
Colombia | The Prosecutor General's Human Rights Unit was investigating the case. (references) | |
Guatemala | The Discipline Unit investigated 503 cases of wrongdoing during the year. (references) | |
Minorities | East Timor | Residents reportedly targeted the mosque as a result of local animosity toward a Jordanian Rapid Reaction Unit based nearby. (references) |
United Kingdom | The Race Equality Unit of the Home Office published a report, "Community Cohesion," in November that discussed Government strategies and proposals to address racial divides. (references) | |
Croatia | In the wake of the autumn 2000 termination of the OSCE police monitoring group in the Danubian region (and its replacement with a smaller civilian unit), the police continued to respond appropriately to law and order issues, although some NGO's continued to express concern that ethnic Serbs were reluctant to report ethnically-motivated incidents to authorities. (references) | |
Political Economy | South Africa | The SANDF and the SAPS border control and policing unit share responsibility for external security. (references) |
HAITI | The Haitian dollar, an artificial construct and not an actual unit of currency, is worth five gourdes. (references) | |
VENEZUELA | This police unit has the power to seize goods, make arrests and close establishments for violations of the law. (references) | |
Political Rights | Ghana | In 1998 citizens elected representatives to the district assemblies and, for the first time, unit committees, which form the basis of the local government structure. (references) |
Trade | India | A SEZ unit engaged in trading will not be permitted DTA sales. (references) |
Singapore | A specific rate is a particular amount per unit of weight or other quantity. (references) | |
Travel | Singapore | Singapore's unit of currency is the Singapore dollar. (references) |
Indonesia | Note: A government hospital with a good intensive care unit. (references) | |
Ireland | The basic monetary unit is the Irish Pound (IR£) also known as the Punt. (references) | |
Women | Brunei | Female officers staff the unit. (references) |
Brunei | The Social Affairs Services unit provides counseling for women and their spouses. (references) | |
Malta | As of October, 168 cases of domestic violence were reported to the Police Domestic Violence Unit. (references) | |
Worker Rights | Saint Vincent and the Grenadines | Labor officers in this unit conduct general inspections of work places annually. (references) |
Romania | The unit had conducted a series of human trafficking arrests by the end of the year. (references) | |
Lebanon | Worker representatives must be chosen from those employed within the bargaining unit. (references) | |
Lexicography | Devil's Dictionary | RESPLENDENT, adj. Like a simple American citizen beduking himself in his lodge, or affirming his consequence in the Scheme of Things as an elemental unit of a parade. The Knights of Dominion were so resplendent in their velvet- and-gold that their masters would hardly have known them. "Chronicles of the Classes" |
Source: compiled by the editor from ICON Group International, Inc.; see credits. | ||
| Speaker | Phrase(s) |
Dennis Miller | The media is notorious for making us feel inadequate by raising our expectations and constantly barraging us with images of the perfect, ideal family unit. |
Source: compiled by the editor from various references; see credits. | |
| Speaker | Term | Phrase(s) |
Harry S. Truman | 1945-1953 | Now, with the surrender of our enemies, economic stabilization requires that policies be directed toward promoting an increase in supplies at low unit prices. |
Bill Clinton | 1993-2001 | Last year, he led an infantry unit that stopped mob of extremists from taking over a radio station that is a voice of democracy and tolerance in Bosnia. |
Source: compiled by the editor from various references. | ||
| "Unit" is generally used as a noun (singular) -- approximately 99.85% of the time. "Unit" is used about 10,909 times out of a sample of 100 million words spoken or written in English. Its rank is based on over 700,000 words used in the English language. Some parts-of-speech are not covered due to the samples used by the British National Corpus. (note: percents less than one-hundredth of one percent have been omitted) |
| Parts of Speech | Percent | Usage per 100 Million Words | Rank in English |
| Noun (singular) | 99.85% | 10,893 | 853 |
| Noun (proper) | 0.14% | 15 | 90,616 |
| Total | 100.00% | 10,909 | N/A |
Source: compiled by the editor from several corpora; see credits.
| Country | Name | Country | Name |
| Netherlands | Unit 4 Agresso N.V. | USA | Unit Corpn. |
| (more examples...) |
Source: compiled by the editor from Icon Group International, Inc.
Expressions using "unit": ( documentary unit ♦ absolute unit ♦ absorption unit ♦ Abstract unit ♦ acceleration unit ♦ accepting unit ♦ access unit ♦ accessible hermetic compressor unit ♦ accessory unit ♦ accident and emergency unit ♦ accommodation unit ♦ acknowledgement signal unit ♦ acknowledgment signal unit ♦ adjacent unit ♦ administrative unit ♦ aeromedical staging unit ♦ afghan monetary unit ♦ air standing unit ♦ air traffic control unit ♦ air traffic services unit ♦ air unit ♦ aircraft control unit ♦ albanian monetary unit ♦ algerian monetary unit ♦ allocation unit ♦ ammunition unit ♦ ancient unit of weight ♦ angolan monetary unit ♦ angstrom unit ♦ angular unit ♦ animal unit ♦ antenna select unit ♦ apothecaries' unit ♦ apple Attachment Unit Interface ♦ application Protocol Data Unit ♦ area unit ♦ argentine monetary unit ♦ arithmetic and logic unit ♦ arithmetic and logical unit ♦ arithmetic logic unit ♦ army unit ♦ artillery unit ♦ Asian Currency Unit ♦ Asian Monetary Unit ♦ astronomic unit ♦ astronomical unit ♦ astronomy unit ♦ atomic mass unit ♦ attachment Unit Interface ♦ audio access unit ♦ austrian monetary unit ♦ automatic calling unit ♦ auxiliary power unit ♦ avoirdupois unit ♦ Bahrainian monetary unit ♦ Bangladeshi monetary unit ♦ base control unit ♦ base unit ♦ battery charging unit ♦ bhutanese monetary unit ♦ bibliographic unit ♦ bibliographical unit ♦ bid unit prices ♦ binary threshold unit ♦ binary unit of information content ♦ blemished unit ♦ board of Trade unit ♦ Bohr unit ♦ bolivian monetary unit ♦ bomb disposal unit ♦ booster unit ♦ Botswana monetary unit ♦ box unit ♦ brazilian monetary unit ♦ british capacity unit ♦ british monetary unit ♦ british thermal unit ♦ building unit ♦ bulgarian monetary unit ♦ cambodian monetary unit ♦ camera control unit ♦ candlepower unit ♦ capacitance unit ♦ capacity unit ♦ Cape Verde monetary unit ♦ casualty staging unit ♦ casualty unit ♦ central processing unit ♦ central switch unit ♦ channel service unit ♦ channel service unit/data service unit ♦ channel signaling unit ♦ channel signalling unit ♦ charge per unit ♦ charge unit ♦ chilean monetary unit ♦ chinese monetary unit ♦ cluster bomb unit ♦ coast watching unit ♦ colombian monetary unit ♦ combat unit. Additional references. | |
| Hyphenated Usage | |
Beginning with "unit": unit-based, unit-cell, unit-cost, unit-credit, unit-level, unit-linked, unit-load, unit-loads, unit-managed, unit-membrane, unit-meme, unit-of-work, unit-points, unit-school, unit-shifting, unit-such, unit-trust, unit-type. | |
Ending with "unit": business-unit, non-unit, per-unit, sealed-unit, sub-unit, tone-unit. | |
Containing "unit": five-unit code, seven-unit code, visual-display-unit-based. | |
| Source: compiled by the editor from various references; see credits. | |
| The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com. |
| Expression | Frequency per Day | Expression | Frequency per Day |
g unit | 1,561 | g picture unit | 120 |
unit conversion | 1,184 | display unit | 113 |
gps unit | 869 | unit trust | 104 |
self storage unit | 774 | central air unit | 102 |
wall unit | 718 | entertainment wall unit | 90 |
storage unit | 619 | g lyrics unit | 89 |
ten unit | 526 | metric unit | 86 |
air conditioning unit | 331 | portable air conditioning unit | 84 |
unit converter | 301 | central air conditioning unit | 83 |
unit | 292 | unit heater | 82 |
unit of measure | 281 | si unit | 82 |
thematic unit | 261 | total annihilation unit | 77 |
measurement unit | 229 | shower unit | 76 |
entertainment unit | 219 | continuing education unit | 72 |
50 cent and g unit | 186 | g pic unit | 70 |
dealer heater unit wholesale | 177 | head unit | 69 |
g unit.com | 163 | unit investment trust | 68 |
circle unit | 138 | british thermal unit | 68 |
shelving unit | 123 | central processing unit | 65 |
clothing g unit | 123 | g shoes unit | 65 |
| Source: compiled by the editor from various references; see credits. | |||