hypocycloidal

hypocycloid

[hahy-puh-sahy-kloid]
noun Geometry.
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:
1835–45; hypo- + cycloid

hypocycloidal, adjective
Dictionary.com Unabridged
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World English Dictionary
hypocycloid (ˌhaɪpəˈsaɪklɔɪd)
 
n
epicycloid Compare cycloid a curve described by a point on the circumference of a circle as the circle rolls around the inside of a fixed coplanar circle
 
hypocy'cloidal
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
hypocycloid   (hī'pō-sī'kloid')  Pronunciation Key 


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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.
The American Heritage® Science Dictionary
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