- (n.) A circle which rolls on the circumference of another circle, either externally or internally.
- (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.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). epicycle. Retrieved September 23, 2026, from http://smartdefine.org/epicycle/definitions/2004092 |
| Chicago | Webster's. 2011. "epicycle" http://smartdefine.org/epicycle/definitions/2004092 (accessed September 23, 2026). |
| Harvard | Webster's 2011, epicycle, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/epicycle/definitions/2004092>. |
| MLA | Webster's. "epicycle" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/epicycle/definitions/2004092> |