What's the difference between epicycloid and epitrochoid?

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.

Epitrochoid

Definition:

• (n.) A kind of curve. See Epicycloid, any Trochoid.

Example Sentences: