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cycloid
[ sahy-kloid ]
adjective
- resembling a circle; circular.
- (of the scale of a fish) smooth-edged, more or less circular in form, and having concentric striations.
- (of a fish) having such scales.
- Psychiatry. of or noting a personality type characterized by wide fluctuation in mood within the normal range.
noun
- a cycloid fish.
- Geometry. a curve generated by a point on the circumference of a circle that rolls, without slipping, on a straight line.
cycloid
/ ˈsaɪklɔɪd /
adjective
- resembling a circle
- (of fish scales) rounded, thin, and smooth-edged, as those of the salmon
- See cyclothymiapsychiatry (of a type of personality) characterized by exaggerated swings of mood between elation and depression See also cyclothymia
cycloid
/ sī′kloid′ /
- Resembling a circle.
- Thin, rounded, and smooth-edged, like a disk. Used of fish scales.
- The curve traced by a point on the circumference of a circle that rolls on a straight line.
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Derived Forms
- cyˈcloidal, adjective
- cyˈcloidally, adverb
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Other Words From
- cy·cloidal adjective
- cy·cloidal·ly adverb
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Word History and Origins
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Example Sentences
In brief—distinct grounds, and vivid circular or cycloid figures, of no meaning, are here Median laws.
In 1644 he published a tract on the properties of the cycloid in which he suggested a solution of the problem of its quadrature.
Other sharks had piercing teeth (Cladoselache and Cladodus); some, the petalodonts, had peculiar cycloid cutting teeth.
The tail is diphycercal in all, ending in a long point, and the body is covered with cycloid scales.
The Holoptychiidæ have the pectoral fins acute, the scales cycloid, enameled, and the teeth very complex.
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