epicycloid


epi·cy·cloid

noun \ˌe-pə-ˈsī-ˌklid\

Definition of EPICYCLOID

:  a curve traced by a point on a circle that rolls on the outside of a fixed circle
epi·cy·cloi·dal \-sī-ˈkli-dəl\ adjective

Illustration of EPICYCLOID

First Known Use of EPICYCLOID

circa 1755

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