Word Study
hypocycloid
CIDE DICTIONARY
hypocycloid, n. [Pref. hypo- + cycloid: cf. F. hypocycloïde.].
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]
OXFORD DICTIONARY
hypocycloid, n. Math. the curve traced by a point on the circumference of a circle rolling on the interior of another circle.
Derivative
hypocycloidal adj.
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