epitrochoid

== English == === Etymology === From epi- +‎ trochoid. This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term. === Pronunciation === === Noun === epitrochoid (plural epitrochoids) A geometric curve traced by a fixed point on one circle which rotates around the perimeter of another circle. Examples include the shape of the Wankel engine ==== Derived terms ==== epitrochoidal ==== Translations ==== ==== See also ==== epitrochoid on Wikipedia.Wikipedia