TROCHLEARY
Troch"le*a*ry, a. (Anat.)
Defn: Pertaining to, or connected with, a trochlea; trochlear; as, the trochleary, or trochlear, nerve.
TROCHOID
Tro"choid, n. Etym: [Gr. -oid; cf. F. trochoïde. See Troche.] (Geom.)
Defn: The curve described by any point in a wheel rolling on a line; a cycloid; a roulette; in general, the curve described by any point fixedly connected with a moving curve while the moving curve rolls without slipping on a second fixed curve, the curves all being in one plane. Cycloids, epicycloids, hypocycloids, cardioids, etc., are all trochoids.
TROCHOID
Tro"choid, a.
1. (Anat.)
Defn: Admitting of rotation on an axis; — sometimes applied to a pivot joint like that between the atlas and axis in the vertebral column.
2. (Zoöl.)
Defn: Top-shaped; having a flat base and conical spire; — said of certain shells.
3. (Zoöl.)