[troh-koid] 
| 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. |
| 2. | rotating on an axis, as a wheel. |
| tro·choid (trō'koid', trŏk'oid') n. A curve traced by a point on or connected with a circle as the circle rolls along a fixed straight line. adj. also tro·choi·dal (trō-koid'l, trŏk-oid'l)
[Greek trokhoeidēs, wheellike : trokhos, wheel; see trochee + -oeidēs, -oid.] tro·choi'dal·ly adv. |
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.
kɔɪd
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