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
tro•choi′dal, adj. tro•choi′dal•ly, adv. Collins Concise English Dictionary © HarperCollins Publishers:: trochoid /ˈtrəʊkɔɪd/ n - the curve described by a fixed point on the radius or extended radius of a circle as the circle rolls along a straight line
adj Also: trochoidal - rotating or capable of rotating about a central axis
- (of a structure or part) resembling or functioning as a pivot or pulley
Etymology: 18th Century: from Greek trokhoeidēs circular, from trokhos wheel |