Cycloid

  

Copyright © Philip M. Parker, INSEAD. Terms of Use.

Cycloid

Definition: Cycloid

Cycloid

Adjective

1. Resembling a circle.

Noun

1. A line generated by a point on a circle rolling along a straight line.

Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved.
 

Date "cycloid" was first used in popular English literature: sometime before 1686. (references)


Synonym: Cycloid

Synonym: cycloidal (adj). (additional references)

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Specialty Definition: Cycloid

(From Wikipedia, the free Encyclopedia)

A cycloid is the shape defined by a fixed point on a wheel as it rolls, or, more precisely, the locus of a point on the rim of a circle rolling along a straight line.

The cycloid was first studied by Nicholas of Cusa and later by Mersenne. It was named by Galileo in 1599. In 1634 G.P. de Roberval showed that the area under a cycloid is three times the area of its generating circle. In 1658 Christopher Wren showed that the length of a cycloid is four times the diameter of its generating circle.

The cycloid is the solution to the brachistochrone problem and the related tautochrone problem. The cycloid has been called "The Helen of Geometers" as it caused frequent quarrels among 17th century mathematicians.

Equations (parametric):

x = a(t - sin t)
y = a(1 - cos t)

Related curves

Several curves are related to the cycloid. When we relax the requirement that the fixed point be on the rim of the circle, we get the curtate cycloid and the prolate cycloid. In the former case the point tracing out the curve is inside the circle and in the latter case it is outside. A trochoid refers to any of the cycloid, the curtate cycloid and the prolate cycloid. If we further allow the line on which the circle rolls to be an arbitrary circle (a straight line is a circle of infinite radius) then we get the epicycloid (circle rolling on outside of another circle, point on the rim of the rolling circle), the hypocycloid (circle on the inside, point on the rim), the epitrochoid (circle on the outside, point anywhere on circle), and the hypotrochoid (circle on the inside, point anywhere on circle).

External links

Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Cycloid."

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Synonyms within Context: Cycloid

ContextSynonyms within Context (source: adapted from Roget's Thesaurus).

Circularity

Ellipse, oval, ovule; ellipsoid, cycloid; epicycloid, epicycle; semicircle; quadrant, sextant, sector.

Source: adapted from Roget's Thesaurus.

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Crosswords: Cycloid

English words defined with "cycloid": Brachystochronecurate cycloid, Curtate cycloid, Cycloganoidei, Cycloidian, cyprinid, cyprinid fishInflected cycloidPoint of concurrence, Prolate cycloidTautochrone, Trochoid. (references)

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Commercial Usage: Cycloid

DomainTitle

Books

  • Cycloid (reference)

  • Leonhard Classification of Endogenous Psychoses: Cycloid Psychoses, Differentiated Nosology, Differentiated Therapy & Historical Aspects - Journal: PS (reference)

    (more book examples)

Source: compiled by the editor from various references; see credits.

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Photo Album: Cycloid

ThumbnailDescription & Credit

"Cycloid" (movie) by Cycloid page.

Source: pictures compiled by the editor from various references; see picture credits.

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Use in Literature: Cycloid

TitleAuthorQuote

Gulliver's Travels

Swift, Jonathan

In the first course there was a shoulder of mutton, cut into an equilateral triangle, a piece of beef into a rhomboides, and a pudding into a cycloid.

Source: compiled by the editor from various references.

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Usage Frequency: Cycloid

"Cycloid" is generally used as a noun (singular) -- approximately 83.33% of the time. "Cycloid" is used about 6 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 SpeechPercentUsage per
100 Million Words
Rank in English
Noun (singular)83.33%5157,705
Adjective (general or positive)16.67%1339,140
                    Total100.00%6N/A

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

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Expressions: Cycloid

Expressions using "cycloid": curate cycloid Curtate cycloid Cycloid scale Inflected cycloid prolate cycloid. Additional references.

Source: compiled by the editor from various references; see credits.

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Frequency of Internet Keywords: Cycloid

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.
 
ExpressionFrequency
per Day

cycloid

14
Source: compiled by the editor from various references; see credits.

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Modern Translation: Cycloid

Language Translations for "cycloid"; alternative meanings/domain in parentheses.

Arabic 

  

‏الدويري خط منحن على محيط كرة. (various references)

   

Bulgarian 

  

циклоида. (various references)

   

Chinese 

  

摆线. (various references)

   

Czech

  

cykloidní. (various references)

   

Farsi 

  

منحنی (Bent, Crump, Round), شبیه دایره . (various references)

   

French

  

cycloïde. (various references)

   

German

  

Zykloide, Radlaufkurve. (various references)

   

Greek 

  

κυκλοειδήσ (orbital). (various references)

   

Hungarian

  

ciklois. (various references)

   

Japanese Kanji 

  

サイクルアンドライド方式 (cycle and ride system, cycle ball, cycle hit, cycle soccer, cycle stock, cycle time, cyclo-C, cyclocytidine). (various references)

   

Japanese Katakana 

  

サイクロイド . (various references)

   

Manx

  

kiarkyloid. (various references)

   

Pig Latin

  

ycloidcay

   

Portuguese

  

ciclóide. (various references)

   

Russian 

  

циклоида. (various references)

   

Serbo-Croatian

  

cikloida. (various references)

   

Spanish

  

cicloide. (various references)

   

Swedish

  

cykloid. (various references)

   

Ukrainian

  

циклоїда. (various references)

Source: compiled by the editor from various translation references.

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Derivations & Misspellings: Cycloid

Derivations

Words beginning with "cycloid": cycloidal, cycloids. (additional references)

Words ending with "cycloid": epicycloid, hypocycloid. (additional references)

Words containing "cycloid": epicycloidal, epicycloids, hypocycloids. (additional references)


Misspellings

"Cycloid" is suggested in spellcheckers for the following: acylcoa, ciclid, cyclo, cycloidal, cyclotis. (additional references)

Source: compiled by the editor, based on several corpora (additional references).

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Anagrams: Cycloid

Scrabble® Enable2K-Verified Anagrams

Words within the letters "c-c-d-i-l-o-y"

-2 letters: colic, cyclo, doily, dolci.

-3 letters: clod, cloy, coil, cold, coly, diol, idly, idol, idyl, lido, loci, odic, odyl, oily, oldy.

-4 letters: cod, col, coy, doc, dol, icy, lid, oil, old, yid, yod.

-5 letters: do, id, li, lo, od, oy, yo.

 Words containing the letters "c-c-d-i-l-o-y"
 

+1 letter: cycloids.

 

+2 letters: cycloidal.

 

+3 letters: codicology, cyclodiene, cyclopedia, cyclopedic, epicycloid, glycosidic.

 

+4 letters: accordingly, codicillary, comedically, conceitedly, cyclodienes, cyclopaedia, cyclopedias, doxycycline, epicycloids, hypocycloid.

 

+5 letters: achlorhydric, cathodically, coincidently, conchoidally, cyclodextrin, cyclopaedias, dicarboxylic, dichotically, doxycyclines, encyclopedia, encyclopedic, epicycloidal, hypocycloids, occidentally, radiolucency.

Source: compiled by the editor from various references; see credits.

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INDEX

1. Definition
2. Synonyms
3. Crosswords
4. Usage: Commercial
5. Images: Photo Album
6. Quotations: Fiction
7. Usage Frequency
8. Expressions
9. Expressions: Internet
10. Translations: Modern
11. Derivations
12. Anagrams
13. Bibliography


  

Copyright © Philip M. Parker, INSEAD. Terms of Use.