| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024tro•choid (trō′koid),USA pronunciation n. - Mathematics[Geom.]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.
adj. - rotating on an axis, as a wheel.
- Greek trochoeidé̄s round like a wheel. See troche, -oid
- 1695–1705
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