cycloid
[sī′klo̵id′]
noun
Geom. a curve traced by any point on a radius, or an extension of the radius, of a circle which rolls without slipping through one complete revolution along a straight line in a single plane; trochoid
Origin of cycloid
Classical Greek kykloeidēs, circular ; from kyklos (see wheel) + -eidēs, -oidadjective
- circular
- designating or having fish scales that are roundish in form with smooth edges
- designating or of a cyclothymic person
Related Forms:
- cycloidal
adjective
cycloid
adjective
- Resembling a circle.
- Zoology a. Relating to or being a kind of fish scale that is thin, rounded, and smooth-edged and often shows concentric growth rings.b. Having cycloid scales.
- Psychology Afflicted with or relating to cyclothymia.
noun
Mathematics The curve traced by a point on the circumference of a circle that rolls on a straight line.
Origin of cycloid
French cyclo&idie;de, from Greek kukloeidēs, circular : kuklos, circle; see k^{w}el-^{1} in Indo-European roots + -oeidēs, -oid.Related Forms:
- cy·cloi′dal
adjective
cycloid
top: surface view of cycloid scales of a bony fish
bottom: The parametric equations of this cycloid are
x = r(&thgr; - sin &thgr;),
y = r(1 - cos &thgr;).
cycloid
cycloid
Noun
(plural cycloids)
Adjective
Origin
cyclo- + -oid