Trochoid
The curve described by a point at a distance 
from the center of a rolling Circle of Radius 
.
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If
, the curve is a Curtate Cycloid. If 
, the curve is a Cycloid. If 
, the curve is aProlate Cycloid.See also Curtate Cycloid, Cycloid, Prolate Cycloid
References
Lee, X. ``Trochoid.''http://www.best.com/~xah/SpecialPlaneCurves_dir/Trochoid_dir/trochoid.html. Wagon, S. Mathematica in Action. New York: W. H. Freeman, pp. 46-50, 1991. Yates, R. C. ``Trochoids.'' A Handbook on Curves and Their Properties. Ann Arbor, MI: J. W. Edwards, pp. 233-236, 1952.
- Diminished Rhombicosidodecahedron
- Dini Expansion
- Dini's Surface
- Dini's Test
- Dinitz Problem
- Diocles's Cissoid
- Diophantine Equation
- Diophantine Equation--10th Powers
- Diophantine Equation--5th Powers
- Diophantine Equation--6th Powers
- Diophantine Equation--7th Powers
- Diophantine Equation--8th Powers
- Diophantine Equation--9th Powers
- Diophantine Equation--Cubic
- Diophantine Equation--Linear
- Diophantine Equation nth Powers
- Diophantine Equation--Quadratic
- Diophantine Equation--Quartic
- Diophantine Quadruple
- Diophantine Set
- Diophantus Property
- Diophantus' Riddle
- Dipyramid
- Dirac Delta Function
- Dirac Matrices