What's the difference between epitrochoid and hypotrochoid?
Epitrochoid
Definition:
(n.) A kind of curve. See Epicycloid, any Trochoid.
Example Sentences:
Hypotrochoid
Definition:
(n.) 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.