| 单词 | trochoid |
| 释义 | trochoid —trochoidal, adj. —trochoidally, adv. /troh"koyd/, n. 1. 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 = a t - b sin(t), y = a - b cos(t). adj. 2. rotating on an axis, as a wheel. [1695-1705; < Gk trochoeidés round like a wheel. See TROCHE, -OID] |
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