Trochoid
Pronunciation : Tro"choid
Part of Speech : n.
Etymology : [Gr. -oid; cf. F. trocho?de. See Troche.] (Geom.)
Definition : 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.
Source : Webster's Unabridged Dictionary, 1913
Pronunciation : Tro"choid
Part of Speech : a.
Definition : 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. (Zo?l.)
Defn: Top-shaped; having a flat base and conical spire; -- said of certain shells.
3. (Zo?l.)
Defn: Of or pertaining to the genus Trochus or family Trochid
Source : Webster's Unabridged Dictionary, 1913