What's the difference between epicycle and epicycloid?

Epicycle


Definition:

  • (n.) A circle, whose center moves round in the circumference of a greater circle; or a small circle, whose center, being fixed in the deferent of a planet, is carried along with the deferent, and yet, by its own peculiar motion, carries the body of the planet fastened to it round its proper center.
  • (n.) A circle which rolls on the circumference of another circle, either externally or internally.

Example Sentences:

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.

Words possibly related to "epicycle"