tetracuspid
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tetracuspid — noun An astroid … Wiktionary
Astroid — In mathematics, an astroid is a particular type of curve: a hypocycloid with four cusps.Astroids are also superellipses: all astroids are scaled versions of the curve specified by the equation:x^{2/3} + y^{2/3} = 1 ,.Its modern name comes from… … Wikipedia
quadricuspid — SYN: tetracuspid. * * * quad·ri·cus·pid (kwod″rĭ kusґpid) [quadri + cuspid] 1. having four cusps; said of a tooth, or of a semilunar (aortic or pulmonary) valve with four cusps. 2. a tooth with four cusps … Medical dictionary
