a curve generated by the motion of a point on the circumference of a circle that rolls internally, without slipping, on a given circle.
Origin of hypocycloid
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Historical Examples of hypocycloid
The curve generated by rolling on the concave side is called a 'hypocycloid'.The New Gresham Encyclopedia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
The curve described by a point on the circumference of a circle as the circle rolls on the inside of the circumference of a second, fixed circle.
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