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adj. Resembling a circle.

adj. Zoology Thin, rounded, and smooth-edged; disklike. Used of fish scales.

adj. Zoology Having or composed of such scales.

adj. Psychiatry 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.

n. Zoology A fish having cycloid scales.

n. The locus of a point on the circumference of a circle that rolls without slipping on a fixed straight line.

n. A fish having cycloid scales.

adj. Resembling a circle; cycloidal.

adj. (of fish scales) Thin and rounded, with smooth edges.

n. A curve generated by a point in the plane of a circle when the circle is rolled along a straight line, keeping always in the same plane.

adj. Of or pertaining to the Cycloidei.

n. One of the Cycloidei.

Resembling a circle; having a circular form.

Specifically In ichthyology: More or less circular, with concentric striations: applied to the scales of certain fishes. See cut under scale.

Having somewhat circular scales, as a fish; specifically, pertaining to the Cycloidei.

n. A curve generated by a point in the circumference or on a radius of a circle when the circle is rolled along a straight line and kept always in the same plane.

n. In ichthyology, a cycloid fish; a fish with cycloid scales, or one of the Cycloidei.

In chem., containing a cycle or ring of atoms: used especially of the structure of organic compounds.

adj. resembling a circle

n. a line generated by a point on a circle rolling along a straight line

"8.13 A Beautiful Curve ∗ One of the most wonderful curves I can think of, and one that had a great in fl uence on me in my youth, is called a cycloid, which is the locus ∗ ∗ of a fi xed point on the circumference of a circle as it rolls, without slipping, along a straight line (Figure 8.8)."

rounded   

companion to the cycloid    Spirograph   

hypocycloid    epicycloid   

cycloidal    cycloidal engine    cycloidal arch   

circular   

degree    settling-in    not-so    flu-like    points