WordNet (3.0) WordNet (3.0)
(n) a line generated by a point on a circle that rolls around inside another circle
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n. [ Pref. hypo- + cycloid: cf. F. hypocycloïde. ] (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 ]
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