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  1. epicycle

    • IPA[ˈɛpɪˌsʌɪk(ə)l]

    英式

    • n.
      a small circle whose centre moves round the circumference of a larger one.;an epicycle used to describe planetary orbits in the Ptolemaic system.
    • noun: epicycle, plural noun: epicycles

    • 更多解釋
    • IPA[ˈepəˌsīk(ə)l]

    美式

    • n.
      a small circle whose center moves around the circumference of a larger one.

    Oxford American Dictionary