cy·cloid (s  kloid )adj. 1. Resembling a circle. 2. Zoology a. Thin, rounded, and smooth-edged; disklike. Used of fish scales. b. Having or composed of such scales. 3. Psychiatry Afflicted with or relating to cyclothymia. n. 1. Mathematics The curve traced by a point on the circumference of a circle that rolls on a straight line. 2. Zoology A fish having cycloid scales. [French cycloïde, from Greek kukloeid  s, circular : kuklos, circle; see kwel-1 in Indo-European roots + -oeids, -oid.]cy·cloi dal (-kloidl) adj. |   top: surface view of cycloid scales of a bony fish bottom: The parametric equation of this cycloid is: x=r(  - sin)y=r(1 - cos ) |
cycloid [ˈsaɪklɔɪd]
adj
1. (Mathematics) resembling a circle
2. (Life Sciences & Allied Applications / 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
n
1. (Mathematics) Geometry the curve described by a point on the circumference of a circle as the circle rolls along a straight line Compare trochoid [1]
2. (Life Sciences & Allied Applications / Zoology) a fish that has cycloid scales
cycloidal adj
cycloidally adv
| cycloid (skloid) 1. Resembling a circle. 2. Thin, rounded, and smooth-edged, like a disk. Used of fish scales. 3. The curve traced by a point on the circumference of a circle that rolls on a straight line. |  |
ThesaurusLegend: Synonyms Related Words Antonyms
| 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 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 rounded - curving and somewhat round in shape rather than jagged; "low rounded hills"; "rounded shoulders" |
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