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more about epicycle
epicycle |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Epicycle \Ep"i*cy`cle\, n. [L. epicyclus Gr ?; 'epi` upon + ? circle. See {Cycle}.] 1. (Ptolemaic Astron.) 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. The schoolmen were like astronomers which did feign eccentries and epicycles, and such engines of orbs. --Bacon. 2. (Mech.) A circle which rolls on the circumference of another circle, either externally or internally. From WordNet r 1.6 [wn]: epicycle n : a circle that rolls around (inside or outside) another circle; generates an epicycloid or hypocycloid
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