EPICYCLES

Noun

epicycles

plural of epicycle

Source: Wiktionary


EPICYCLE

Ep"i*cy`cle, n. Etym: [L. epicyclus, Gr. Cycle.]

1. (Ptolemaic Astron.)

Definition: 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.)

Definition: A circle which rolls on the circumference of another circle, either externally or internally.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

11 January 2025

COWBERRY

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