Trochilus
(||Troch"i*lus) n.; pl. Trochili [L. trochilus a kind of small bird. Gr. fr. to run.]
1. (Zoöl.) (a) A genus of humming birds. It Formerly included all the known species. (b) Any one of
several species of wrens and kinglets. [Obs.] (c) The crocodile bird.
2. (Arch.) An annular molding whose section is concave, like the edge of a pulley; — called also scotia.
Troching
(Tro"ching) n. [OF. troche cluster, group; cf. F. trochure a surantler, trochée branches of a
seedling, trochet cluster of flowers or fruits.] (Zoöl.) One of the small branches of a stag's antler.
Trochiscus
(||Tro*chis"cus) n.; pl. Trochisci [L., fr. Gr. a small ball, dim. of a wheel. See Troche.]
(Pharm.) A kind of tablet or lozenge; a troche.
Trochisk
(Tro"chisk) n. [Cf. F. trochisque.] See Trochiscus. [Obs.] Bacon.
Trochite
(Tro"chite) n. (Paleon.) A wheel-like joint of the stem of a fossil crinoid.
Trochlea
(||Troch"le*a) n. [L., a case or sheaf containing one or more pulleys, Gr. . See Trochilics.]
1. (Mach.) A pulley. [Obs.]
2. (Anat.) A pulley, or a structure resembling a pulley; as, the trochlea, or pulleylike end, of the humerus,
which articulates with the ulna; or the trochlea, or fibrous ring, in the upper part of the orbit, through
which the superior oblique, or trochlear, muscle of the eye passes.
Trochlear
(Troch"le*ar) n. [L. trochlea block or pulley.] (Anat.) Shaped like, or resembling, a pulley; pertaining
to, or connected with, a trochlea; as, a trochlear articular surface; the trochlear muscle of the eye.
Trochlear nerve. See Pathetic nerve, under Pathetic.
Trochleary
(Troch"le*a*ry) a. (Anat.) Pertaining to, or connected with, a trochlea; trochlear; as, the trochleary,
or trochlear, nerve.
Trochoid
(Tro"choid) n. [Gr. a wheel + - oid; cf. F. trochoïde. See Troche.] (Geom.) 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.) 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.) Top-shaped; having a flat base and conical spire; — said of certain shells.
3. (Zoöl.) Of or pertaining to the genus Trochus or family Trochidæ.
Trochoidal
(Tro*choid"al) a.
1. (Geom.) Of or pertaining to a trochoid; having the properties of a trochoid.
2. (Anat. & Zoöl.) See Trochoid, a.
Trochometer
(Tro*chom"e*ter) n. [Gr. a wheel + -meter.] A contrivance for computing the revolutions
of a wheel; an odometer.
