Isotope

Definition: Isotope

Isotope

Noun

1. One of two or more atoms with the same atomic number but with different numbers of neutrons.

Date "isotope" was first used: 1913. (references)

Specialty Definition: Isotope

Domain	Definition
Aerospace	1. On of several nuclides having the same number of protons in their nuclei, and hence belonging to the same element, but differing in the number of neutrons and therefore in mass number A, or in energy content (isomers). For example, 6C612, 6C713, and 6C814 are carbon isotopes. Small quantitative differences in chemical properties exist between isotopes. 2. A radionuclide or a preparation of an element with special isotopic composition (allobar) as an article of commerce, so called because of the principal use of such materials as radioactive tracers.3. In common usage, a synonym for nuclide (not recommended). (references)
Biology & Biotechnology	Any of two or more species of atoms of a chemical element with the same atomic number(the same number of protons but a different number of neutrons). Source: European Union. (references)
Chemistry	One of a set of nuclides having the same number of protons, hence constituting the same chemical element but differing in number of neutrons. Source: European Union. (references)
Energy	Any two or more forms of an element having identical or very closely related chemical propeties and the same atomic number but different atomic weights or mass numbers. (references)
Environment	A variation of an element that has the same atomic number of protons but a different weight because of the number of neutrons. Various isotopes of the same element may have different radioactive behaviors, some are highly unstable.. (references)
Geological	Different forms of a single element that have the same number of protons but different numbers of neutrons in their nuclei. Some radioactive isotopes are unstable and shed nuclear particles over time until they become stable. For instance, unstable isotopes of uranium break down to become lead. (references)
Physics	One of two or more atoms having the same number of protons in its nucleus, but a different number of neutrons and, therefore, a different mass. (references)
Public Administration	Nuclides having the same atomic number and thus identical chemical properties. Source: European Union. (references)
Source: compiled by the editor from various references; see credits.

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Abbreviations & Acronyms: Isotope

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
ISOTOPE	English	Improved Structure and Organisation for Urban Transport Operations of Passengers in Europe	Transportation
Source: compiled by the editor, based on several corpora (additional references).

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Crosswords: Isotope

English words defined with "isotope": abundance, atomic mass, atomic number 61, atomic number 69, atomic number 90 ♦ beta particle ♦ carbon 14, cesium 137, ci, cobalt 60, Curie ♦ deuterium ♦ heavy, heavy hydrogen ♦ iodine-125, iodine-131, isotopic ♦ label ♦ plutonium 239, promethium ♦ radiocarbon, radiochlorine, radioisotope, radiothorium, rubidium-strontium dating ♦ strontium 90 ♦ Th, thorium, thorium-228, thulium, Tm, tracer, tritium ♦ uranium 235, uranium 238. (references)

Specialty definitions using "isotope": 14C ♦ age ratio ♦ Boron Neutron Capture Therapy ♦ carbon isotope ratio, Carbon Isotopes, Cesium Isotopes, Cobalt Isotopes ♦ daughter product, Daughter products, depleted fuel, Depleted uranium, deuton, DNA probe ♦ Elemental Iodine, enriched fuel, enrichment process ♦ fertile isotope ♦ Gallium Isotopes, gas centrifuge process, gaseous diffusion, Gold Isotopes, ground-water tracers ♦ High-enriched uranium, Histocytochemistry, hold-up, holmium Ho 166 DOTMP ♦ imaging block, impoverished fuel, iodine 131, Iodine Isotopes, isotope effect, Isotope Labeling, isotopic tracer ♦ liquid scintillation counting ♦ molecular probe ♦ natural abundance, Neutron Capture Therapy, Nitrogen Isotopes, Nuclear Magnetic Resonance, Biomolecular, nucleic acid probe, nuclide ♦ parent isotope, Phosphorus Isotopes, Potassium Isotopes ♦ radioactive isotope, radioactive tracer element, radioisotope scanning, Radionuclide, Republic of Côte d'Ivoire ♦ separative work, Sodium Isotopes, spent fuel, S-Process, Stable isotope ♦ tracer isotope, Tritium or Triton ♦ Unstable isotope, uranium galena ♦ Yttrium Isotopes. (references)

Non-English Usage: "Isotope" is also a word in the following languages with English translations in parentheses.

French (isotope, isotopic), German (isotopes).

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Commercial Usage: Isotope

Domain	Title
Books	Application of Isotope Systems to Geological Problems (reference) Carbon Isotope Techniques (Isotopic Techniques in Plant, Soil, and Aquatic Biology Series, Vol 1) (reference) Handbook of Environmental Isotope Geochemistry : The Marine Environment, A (reference) Isotope Hydrology (reference) Magnetic Isotope Effect in Radical Reactions: An Introduction (reference) (more book examples)

Music	Isotope (reference) (more classical music examples; more popular music examples)
Source: compiled by the editor from various references; see credits.

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Photo Album: Isotope

Thumbnail	Description & Credit	Thumbnail	Description & Credit
	This is a histological slide stained with H&E of a human herpesvirus (HHV-6), a type of human herpes virus. In this photomicrograph of infected cells, the black specks indicate the location of a radioactive isotope that has been attached to the viral RNA. In this case, a large number of black specks indicate that this lymphocyte has been infected. Credit: Unknown photographer/artist.		The radioactive isotope section of Bucharest Cancer Institute. / WHO photo. Credit: National Library of Medicine.
Source: pictures compiled by the editor from various references; see picture credits.

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Non-Fiction Usage: Isotope

Subject	Topic	Quote
Health		Once the diagnosis is made, many tests must be done to determine the extent of the tumor, including special x-rays, CT scans, isotope scans, and ultrasound. (references)
		A more sensitive method of finding lesions is a bone scan, in which a small amount of radioactivity (an isotope of technetium) is injected into a vein, taken up by the abnormal tissues, and detected by a scanner. (references)
Source: compiled by the editor from ICON Group International, Inc.; see credits.

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Usage Frequency: Isotope

"Isotope" is generally used as a noun (singular) -- approximately 96.17% of the time. "Isotope" is used about 183 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)	96.17%	176	23,410
Lexical Verb (base form)	1.64%	3	202,518
Noun (proper)	1.64%	3	202,518
Lexical Verb (infinitive)	0.55%	1	339,140
Total	100.00%	183	N/A

Source: compiled by the editor from several corpora; see credits.

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Expressions: Isotope

Expressions using "isotope": fertile isotope ♦ isotope effect ♦ Isotope Labeling ♦ radioactive isotope ♦ tracer isotope. Additional references.
Hypenated Usage
	Ending with "isotope": c-isotope, lead-isotope, nd-isotope, oxygen-isotope, radiogenic-isotope-o-isotope, radio-isotope, sr-isotope.
Source: compiled by the editor from various references; see credits.

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Frequency of Internet Keywords: Isotope

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
albuquerque isotope	448	isotope schedule	6
isotope	375	cambridge isotope laboratory	6
baseball isotope	79	oxygen isotope	6
radioactive isotope	37	isotope price	6
cambridge isotope	19	isotope springfield	6
carbon isotope	17	isotope park	5
stable isotope	15	baseball isotope team	5
albuquerque baseball isotope	15	isotope 217	4
isotope mexico new	14	isotope lab	4
definition isotope	12	isotope ticket	4
table of isotope	8	isotope radio	4
dilution isotope	7	nitrogen isotope	4
albuquerque isotope schedule	7	isotope nm	4
eastern isotope	7	half isotope life	4
albuquerque isotope ticket	7	isotope radioactive use	4
hydrogen isotope	6	isotope stable user	3
cambridge isotope lab	6	abq isotope	3
isotope laboratory product	6	isotope medical	3
isotope links stable	6	isotope uranium	3
isotope product	6	in isotope medicine	3
		isotope market	3
Source: compiled by the editor from various references; see credits.

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Modern Translation: Isotope

Language		Translations for "isotope"; alternative meanings/domain in parentheses.
Albanian		izotop. (various references)

Arabic		‏واحد النظائر, ‏النظير فيزياء. (various references)

Bulgarian		изотоп. (various references)

Chinese		同位� (isotopic). (various references)

Czech		izotop. (various references)

Danish		isotop. (various references)

Dutch		isotoop. (various references)

Farsi		همسان , جسم ایزوتوپ . (various references)

Finnish		isotooppi. (various references)

French		isotope (isotopic). (various references)

German		isotop. (various references)

Greek		ισότοπο. (various references)

Hebrew		איזוטופ. (various references)

Hungarian		izotóp. (various references)

Indonesian		isotop. (various references)

Italian		isotopo. (various references)

Japanese Kanji		同位�" , 同位元� , アイゼンメンゲル症候群 (Eisenmenger syndrome, isotype). (various references)

Japanese Katakana		どういたい, どうい�'�"そ, アイソトープ . (various references)

Korean		동위원소 (isotopic). (various references)

Pig Latin		isotopeay

Portuguese		isotérmico (isothermal), isótopo (Israel). (various references)

Romanian		izotop. (various references)

Russian		изотоп. (various references)

Serbo-Croatian		izotop. (various references)

Spanish		isótopo. (various references)

Swedish		isotop. (various references)

Thai		ไอโซโทป. (various references)

Turkish		izotop. (various references)

Ukrainian		ізотоп (nuclide). (various references)
Source: compiled by the editor from various translation references.

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Ancestral Language Translations: Isotope

Language	Period	Translations
Greek	700 BCE-300 CE	isos. (various references)
Source: compiled by the editor from various references.

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Derivations & Misspellings: Isotope

Derivations
	Words beginning with "isotope": isotopes. (additional references)
	Words ending with "isotope": radioisotope. (additional references)
	Words containing "isotope": radioisotopes. (additional references)
Misspellings
	"Isotope" is suggested in spellcheckers for the following: Astolphe, ecotope, histotype, igotope, iostope, Isodore, isothopy, isotome, isotone, isotop, isotopy, isotropo, isotype, Vistupi. (additional references)
Source: compiled by the editor, based on several corpora (additional references).

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Rhyming with "Isotope"

# of Phoneme Matches	Pronunciation	Word(s) rhyming with "isotope" (pronounced ī"sutō'p)
4	-u t ō' p	epitope.
Source: compiled by the editor (additional references); see credits.

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Anagrams: Isotope

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "e-i-o-o-p-s-t"
	-1 letter: otiose, potsie, sopite.
	-2 letters: estop, pesto, piste, poets, poise, posit, spite, stipe, stoop, stope, topes, topis, topoi, topos.
	-3 letters: epos, oops, oots, opes, opts, peso, pest, pets, pies, piso, pits, poet, pois, pose, post, pots, sept, sipe, site, soot, spit, spot, step, stop, ties, tips, toes, tope, topi, tops.
	-4 letters: its, oes, oot, ope.
	Words containing the letters "e-i-o-o-p-s-t"
	+1 letter: biotopes, goopiest, isophote, isotopes, loopiest, opposite.
	+2 letters: composite, depositor, droopiest, expositor, isophotes, isotopies, opposites, optionees, patooties, porticoes, posterior, snoopiest, spookiest, spooniest, topsoiled.
	+3 letters: apotheosis, composited, composites, coprolites, deposition, depositors, depository, desorption, entropions, episiotomy, epizootics, epizooties, exposition, expositors, expository, geotropism, isotropies, lithopones, logotypies, metropolis, neotropics, operations, oppositely, orthoepies, orthoepist, otoscopies, outpromise, oviposited, pedologist, penologist, phonolites, pilothouse, politicoes, porosities, positioned, posteriors, potboilers, prenotions, priesthood, reposition, repository, resorption, sporozoite, stenotopic, teliospore, topologies, toponymies, typologies, wirephotos.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.