hypotrochoid

== English == === Etymology === From hypo- +‎ trochoid. === Pronunciation === (UK) IPA(key): /ˌhaɪ.pə(ʊ)ˈtɹəʊ.kɔɪd/ (US) IPA(key): /ˌhaɪ.poʊˈtɹoʊ.kɔɪd/, /ˌhaɪ.pəˈtɹoʊ.kɔɪd/ === Noun === hypotrochoid (plural hypotrochoids) (geometry) A geometric curve traced by a fixed point on the radius line outside one circle which rotates inside the perimeter of another circle. ==== Derived terms ==== hypotrochoidal ==== Translations ==== ==== See also ==== hypotrochoid on Wikipedia.Wikipedia epitrochoid cycloid epicycloid hypocycloid spirograph