hypocycloid

 
Pronunciation: /ˌhʌɪpə(ʊ)ˈsʌɪklɔɪd/

noun

Mathematics
  • the curve traced by a point on the circumference of a circle which is rolling on the interior of another circle.

Derivatives

hypocycloidal

Pronunciation: /-ˈklɔɪd(ə)l/
adjective