Trochoid
noun
1.
Geometry. a curve traced by a point on a radius or an extension of the radius of a circle that rolls, without slipping, on a curve, another circle, or a straight line. Equation: x = aθ − b sin θ, y = a − b cos θ.
adjective
2.
rotating on an axis, as a wheel.
noun
1.
the curve described by a fixed point on the radius or extended radius of a circle as the circle rolls along a straight line
adjective
2.
rotating or capable of rotating about a central axis
3.
(anatomy) (of a structure or part) resembling or functioning as a pivot or pulley
trochoid tro·choid (trō’koid’, trŏk’oid’) or tro·choi·dal (trō-koid’l, trŏk-oid’l)
adj.
Capable of or exhibiting rotation about a central axis.
Permitting rotation, as a pivot.
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