epicycle

noun epi·cy·cle \ ˈe-pə-ˌsī-kəl \

Definition of epicycle

1 in Ptolemaic astron : a circle in which a planet moves and which has a center that is itself carried around at the same time on the circumference of a larger circle
2 : a process going on within a larger one

epicyclic

play \ˌe-pə-ˈsī-klik, -ˈsi-klik\ adjective

Origin and Etymology of epicycle

Middle English epicicle, from Late Latin epicyclus, from Greek epikyklos, from epi- + kyklos circle — more at wheel


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