from The American Heritage® Dictionary of the English Language, 4th Edition
- 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- 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.
from the GNU version of the Collaborative International Dictionary of English
- 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.
from The Century Dictionary and Cyclopedia
- 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.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. resembling a circle
- n. a line generated by a point on a circle rolling along a straight line
French cycloïde, from Greek kukloeidēs, circular : kuklos, circle; -oeidēs, -oid.(American Heritage® Dictionary of the English Language, Fourth Edition)