I. ˈsīˌklȯid noun
( -s )
Etymology: French cycloïde, from Greek kykloeidēs, adjective, circular, from kykl- cycl- + -oeidēs -oid
1. : a curve traced by any point on the circumference of a circle that rolls without sliding on a straight line
2. : cyclothyme
[s]cycloid.jpg[/s]
II. adjective
Etymology: Greek kykloeidēs
1. : arranged or progressing in circles : circular
cycloid protoplasmic movements
2. : having concentric lines of growth and a smooth margin and surface
cycloid scales are characteristic of soft-rayed fishes
: consisting of scales of this type
cycloid scalation
: having scales of this type
cycloid fishes
— compare ctenoid
3. : cyclothymic