hypotrochoid

From hypo- +‎ trochoid.

• (UK) IPA^(key): /ˌhaɪ.pə(ʊ)ˈtɹəʊ.kɔɪd/
• (US) IPA^(key): /ˌhaɪ.poʊˈtɹoʊ.kɔɪd/, /ˌhaɪ.pəˈtɹoʊ.kɔɪd/

• Audio (US):

  (file)

hypotrochoid (plural hypotrochoids)

1. (geometry) A geometric curve traced by a fixed point on the radius line outside one circle which rotates inside the perimeter of another circle.

• hypotrochoidal

• hypotrochoid on Wikipedia.Wikipedia
• epitrochoid
• cycloid
• epicycloid
• hypocycloid
• spirograph