Cycloid
Cycloid (s?"kloid) , noun
[Cyclo- + -oid: compare French cycloide.]
(Geometry) 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.
The common cycloid is the curve described when the generating point (p) is on the circumference of the generating circle; the curtate cycloid, when that point lies without the circumference; the prolate or inflected cycloid, when the generating point (p) lies within that circumference.
Cycloid , adjective
(Zoology) Of or pertaining to the Cycloidei.
Collocations (1)
Cycloid scale (Zoology) , a fish scale which is thin and shows concentric lines of growth, without serrations on the margin.
Cycloid , noun
(Zoology) One of the Cycloidei.