Epicycle :: Epicycle (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..
Epicycle :: Epicycle (n.) A circle which rolls on the circumference of another circle, either externally or internally..
Epicyclic :: Epicyclic (a.) Pertaining to, resembling, or having the motion of, an epicycle..
Epicycloid :: Epicycloid (n.) A curve traced by a point in the circumference of a circle which rolls on the convex side of a fixed circle.
Epicycloidal :: Epicycloidal (a.) Pertaining to the epicycloid, or having its properties..