cycloid

(redirected from cycloids)
Also found in: Thesaurus, Medical, Encyclopedia.

cycloid

top: surface view of cycloid scales of a bony fish

bottom: The parametric equations of this cycloid are

x = r(θ - sin θ),

y = r(1 - cos θ).

cycloid

cy·cloid

(sī′kloid′)

adj.

1. Resembling a circle.

2. Zoology

a. Relating to or being a kind of fish scale that is thin, rounded, and smooth-edged and often shows concentric growth rings.

b. Having cycloid scales.

3. Psychology Afflicted with or relating to cyclothymia.

n. Mathematics

The curve traced by a point on the circumference of a circle that rolls on a straight line.

[French cycloïde, from Greek kukloeidēs, circular : kuklos, circle; see k^wel- in Indo-European roots + -oeidēs, -oid.]

cy·cloi′dal (-kloid′l) adj.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

cycloid

(ˈsaɪklɔɪd)

adj

1. (Mathematics) resembling a circle

2. (Zoology) (of fish scales) rounded, thin, and smooth-edged, as those of the salmon

3. (Psychiatry) psychiatry (of a type of personality) characterized by exaggerated swings of mood between elation and depression. See also cyclothymia

4. (Mathematics) geometry the curve described by a point on the circumference of a circle as the circle rolls along a straight line. Compare trochoid¹

5. (Zoology) a fish that has cycloid scales

cyˈcloidal adj

cyˈcloidally adv

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

cy•cloid

(ˈsaɪ klɔɪd)

adj.

1. resembling a circle; circular.

a. (of the scale of a fish) smooth-edged and more or less circular in form.

b. (of a fish) having such scales.

3. Psychiatry. of or denoting a personality type characterized by wide fluctuations in mood within the normal range.

4. a curve generated by a point on the circumference of a circle that rolls, without slipping, on a straight line.

[1655–65; < Greek kykloeidḗs like a circle. See cycle, -oid]

cy•cloi′dal, adj.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Switch to new thesaurus

Noun	1.	cycloid - a line generated by a point on a circle rolling along a straight line line roulette, roulette - a line generated by a point on one figure rolling around a second figure curate cycloid - a cycloid generated by a point inside the rolling circle prolate cycloid - a cycloid generated by a point outside the rolling circle
Adj.	1.	cycloid - resembling a circle cycloidal rounded - curving and somewhat round in shape rather than jagged; "low rounded hills"; "rounded shoulders"

Translations

cicloidă

cycloid

[ˈsaɪklɔɪd] n (Geom) → cicloide f

References in classic literature ?

It was in the left hand try-pot of the Pequod, with the soapstone diligently circling round me, that I was first indirectly struck by the remarkable fact, that in geometry all bodies gliding along the cycloid, my soapstone for example, will descend from any point in precisely the same time.

View in context

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. The second course was two ducks trussed up in the form of fiddles; sausages and puddings resembling flutes and hautboys, and a breast of veal in the shape of a harp.

View in context

In brief - distinct grounds, and vivid circular or cycloid figures, of no meaning, are here Median laws.

View in context

maranjonensis) and presence of tubercles on the lateral surfaces of the body as well as between eyes and ear opening (versus absent from these regions) (Figure S11) and spiny scales surrounding the ear opening (versus cycloids) (Figure S12).

Cryptic Diversity in the Neotropical Gecko Genus Phyllopezus Peters, 1878 (Reptilia: Squamata: Phyllodactylidae): A New Species from Paraguay

Full browser ?

CITE

Site: Follow: Share:

Open / Close