— 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; trochoeidés round like a wheel. See TROCHE, -OID ]