trochoid noun & adjective. ['trǝʊkɔɪd] E18.
[from Greek trokhoeidēs wheel-like, from trokhos wheel: see -OID.]
A. noun. Geometry. A curve traced by a point on or connected with a rolling circle. Now spec. a curve traced by a point on a radius of a circle rotating along a straight line or another circle. E18.
b. adjective.
1. Conchology. = TROCHIFORM. M19.

2. Anatomy. Of a joint: in which one bone rotates freely around a central axis. M19.

3. Geometry. Of the form of a trochoid. L19.

[TahlilGaran] English Dictionary ▲