- (British) IPA: /ˈɛpɪˌsaɪkəl/
epicycle (plural epicycles)
- (astronomy) A small circle whose centre is on the circumference of a larger circle; in Ptolemaic astronomy it was seen as the basis of revolution of the "seven planets", given a fixed central Earth.
- 1603, Michel de Montaigne, John Florio, transl., The Essayes, […], printed at London: By Val[entine] Simmes for Edward Blount […], OCLC 946730821 ↗:, Folio Society, 2006, vol.1, p.155:
- Is it not [Philosophie], that […] teacheth miserie, famine and sicknesse to laugh? Not by reason of some imaginarie Epicicles, but by naturall and palpable reasons.
- (mathematics) Any circle whose circumference rolls around that of another circle, thus creating a hypocycloid or epicycloid.
- (organic chemistry) A ring of atoms joining parts of an already cyclic compound
- French: épicycle
- German: Epizykel
- Italian: epiciclo
- Portuguese: epiciclo
- Russian: эпицикл
- Spanish: epiciclo