cycloid

cycloidtop: surface view of cycloid scales of a bony fishbottom: The parametric equations of this cycloid arex = r(θ - sin θ),y = r(1 - cos θ).cycloid

cy·cloid

C0835500 (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.

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

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cy·cloi′dal (-kloid′l) adj.

cycloid

(ˈsaɪklɔɪd) adj1. (Mathematics) resembling a circle2. (Zoology) (of fish scales) rounded, thin, and smooth-edged, as those of the salmon3. (Psychiatry) psychiatry (of a type of personality) characterized by exaggerated swings of mood between elation and depression. See also cyclothymian4. (Mathematics) geometry the curve described by a point on the circumference of a circle as the circle rolls along a straight line. Compare trochoid¹5. (Zoology) a fish that has cycloid scales cyˈcloidal adj cyˈcloidally adv

cy•cloid

(ˈsaɪ klɔɪd)

adj. 1. resembling a circle; circular. 2. 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. n. 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.

Thesaurus

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

Translations

циклоида