Definitions

1. adjective

relating to or resembling an epitrochoid, a curve traced by a point on a straight line attached to a circular or curved path as it rolls around a fixed circle or point

“The epitrophic shape of the new roller coaster’s path added an exciting twist to the ride.”

2. noun

a curve or figure formed by an epitrochoid

“The engineer studied the epitrophic shape of the gear’s teeth to optimize its performance.”