'Hypotrochoid' definitions:

Definition of 'Hypotrochoid'

From: GCIDE

Hypotrochoid \Hy`po*tro"choid\, n. [Pref. hypo- + trochoid.] (Geom.) A curve, traced by a point in the radius, or radius produced, of a circle which rolls upon the concave side of a fixed circle. See Hypocycloid, Epicycloid, and Trochoid. [1913 Webster]