hypotrochoid Meaning, Definition & Usage

Hy`po*tro"choid noun
Etymology
Pref. hypo- + trochoid.
Definitions
  1. (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.

Webster 1913