# The DICT Development Group

**5 definitions found
for Cycloid****From The Collaborative International Dictionary of English v.0.48 :
**
Cycloid \Cy"cloid\ (s?"kloid), n. [Cyclo- + -oid: cf. F.
cyclo["i]de.] (Geom.)
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.
[1913 Webster]
Note: 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.
[1913 Webster]

**From The Collaborative International Dictionary of English v.0.48 :
**
Cycloid \Cy"cloid\, a. (Zool.)
Of or pertaining to the Cycloidei.
[1913 Webster]
Cycloid scale (Zool.), a fish scale which is thin and shows
concentric lines of growth, without serrations on the
margin.
[1913 Webster]

**From The Collaborative International Dictionary of English v.0.48 :
**
Cycloid \Cy"cloid\, n. (Zool.)
One of the Cycloidei.
[1913 Webster]

**From The Collaborative International Dictionary of English v.0.48 :
**
Brachystochrone \Bra*chys"to*chrone\, n. [Incorrect for
brachistochrone, fr. Gr. bra`chistos shortest (superl. of
brachy`s short) + ? time : cf. F. brachistochrone. ] (Math.)
A curve, in which a body, starting from a given point, and
descending solely by the force of gravity, will reach another
given point in a shorter time than it could by any other
path. This curve of quickest descent, as it is sometimes
called, is, in a vacuum, the same as the cycloid.
[1913 Webster]

**From WordNet (r) 3.0 (2006) :
**
cycloid
adj 1: resembling a circle [syn: cycloid, cycloidal]
n 1: a line generated by a point on a circle rolling along a
straight line

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