Hypocycloid

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Hypocycloid \Hy`po*cy"cloid\, n. [Pref. hypo- + cycloid: cf. F.
     hypocyclo["i]de.] (Geom.)
     A curve traced by a point in the circumference of a circle
     which rolls on the concave side in the fixed circle. Cf.
     {Epicycloid}, and {Trochoid}.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  hypocycloid
       n : a line generated by a point on a circle that rolls around
           inside another circle