What's the difference between epicycloid and hypotrochoid?
Epicycloid
Definition:
(n.) A curve traced by a point in the circumference of a circle which rolls on the convex side of a fixed circle.
Example Sentences:
(1) Therefore, the paths of the individual mandibular points are epicycloids or hypocycloids.
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.