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1. Oxford American Dictionary

   epicycloid

   • IPA[ˌepəˈsīˌkloid]

   美式

   • n.
     a curve traced by a point on the circumference of a circle rolling on the exterior of another circle.

   • noun: epicycloid, plural noun: epicycloids

2. • 更多解釋

   epicycloid

   • IPA[ˌɛpɪˈsʌɪklɔɪd]

   英式

   • n.
     a curve traced by a point on the circumference of a circle rolling on the exterior of another ...

   Oxford Dictionary