Cardioid

2 definitions found

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

  Cardioid \Car"di*oid\, n. [Gr. kardio-eidh`s heart-shaped;
     kardi`a heart + e'i^dos shape.] (Math.)
     An algebraic curve, so called from its resemblance to a
     heart.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  cardioid
       n : an epicycloid in which the rolling circle equals the fixed
           circle