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1. Oxford Dictionary

   epicycle

   • IPA[ˈɛpɪˌsʌɪkl]

   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

2. • 更多解釋

   epicycle

   • IPA[ˈepəˌsīkəl]

   美式

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

   Oxford American Dictionary