epitrochoid

[ ep-i-troh-koid ]
/ ˌɛp ɪˈtroʊ kɔɪd /

Geometry.

a plane curve generated by the motion of a fixed point on the radius or extension of the radius of a circle that rolls externally, without slipping, on a fixed circle. The epitrochoid is a generalization of the epicycloid.

Origin of epitrochoid

First recorded in 1835–45; epi- + trochoid

Example sentences from the Web for epitrochoid