Hypocycloid
Hypocycloid , noun
[Prefix hypo- + cycloid: compare French hypocycloide.]
(Geometry) A curve traced by a point in the circumference of a circle which rolls on the concave side in the fixed circle. Compare Epicycloid, and Trochoid.
Hypocycloid , noun
[Prefix hypo- + cycloid: compare French hypocycloide.]