3. (Bot.) One of the large cells in woody tissue which have spiral,
annular, or other markings, and are connected longitudinally so as to
form continuous ducts.
Tra"che*al (?), a. [Cf.F. tracheal.] Of or pertaining to the trachea;
like a trachea.
||Tra`che*a"ri*a (?), n. pl. [NL.] (Zoöl.) A division of Arachnida
||including those that breathe only by means of tracheæ. It includes
||the mites, ticks, false scorpions, and harvestmen.
||
Tra"che*a*ry (?), a. Tracheal; breathing by means of tracheæ. — n.
(Zoöl.) One of the Trachearia.
||Tra`che*a"ta (?), n. pl. [NL.] (Zoöl.) An extensive division of
||arthropods comprising all those which breathe by tracheæ, as
||distinguished from Crustacea, which breathe by means of branchiæ.
||
Tra"che*ate (?), a. (Zoöl.) Breathing by means of tracheæ; of or
pertaining to the Tracheata.
Tra"che*ate, n. (Zoöl.) Any arthropod having tracheæ; one of the
Tracheata.
Tra"che*id (?), n. (Bot.) A wood cell with spiral or other markings and
closed throughout, as in pine wood.
||Tra`che*i"tis (?), n. [NL. See Trachea, and -itis.] (Med.)
||Inflammation of the trachea, or windpipe.
||
Tra*chel"i*dan (?), n. [Gr. &?; neck.] (Zoöl.) Any one of a tribe of
beetles (Trachelides) which have the head supported on a pedicel. The
oil beetles and the Cantharides are examples.
Tra*chel"i*pod (?), n. [Gr.&?; neck + - pod:cf.F. trachelipode.]
(Zoöl.) One of the Trachelipoda.
||Tra`che*lip"o*da (?), n. pl. [NL. See Trachelipod.] (Zoöl.) An
||extensive artificial group of gastropods comprising all those which
||have a spiral shell and the foot attached to the base of the neck.
||
Tra`che*lip"o*dous (?), a. (Zoöl.) Having the foot united with the
neck; of or pertaining to the Trachelipoda.
Tra`che*lo*bran"chi*ate (?), a. [Gr.&?; + E. tranchiate.] (Zoöl.)
Having the gills situated upon the neck; — said of certain mollusks.
Tra`che*lor"rha*phy (?), n. [Gr. &?; neck + &?; to sew.] (Med.) The
operation of sewing up a laceration of the neck of the uterus.
||Tra*chen"chy*ma (?), n. [NL.,fr. trachea + -enchyma as in E.
||parenchyma.] (Bot.) A vegetable tissue consisting of tracheæ.
||
||Tra`che*o*bran"chi*a (?), n.; pl. Tracheobranchlae (#). [NL. See
||Trachea, and Branchia.] (Zoöl.) One of the gill-like breathing organs
||of certain aquatic insect larvæ. They contain tracheal tubes somewhat
||similar to those of other insects.
||
Tra`che*o*bron"chi*al (?), a. (Zoöl.) Pertaining both to the tracheal
and bronchial tubes, or to their junction; — said of the syrinx of
certain birds.
Tra"che*o*cele (?), n. [Gr. &?; the windpipe + &?; a tumor: cf.F.
tracheocele. ] (Med.) (a) Goiter. (b) A tumor containing air and
communicating with the trachea. Morell Mackenzie.
||Tra`che*oph"o*næ (&?;), n. pl. [NL., from trachea + Gr. fonei^n to
||sound.] (Zoöl.) A group of passerine birds having the syrinx at the
||lower end of the trachea.
||
Tra`che*os"co*py (?), n. [Trachea + -scopy.] (Med.) Examination of the
interior of the trachea by means of a mirror.
Tra`che*ot"o*my (?), n. [Trachea + Gr. &?; to cut: cf.F. tracheotomie.]
(Surg.) The operation of making an opening into the windpipe.
Tra"chi*noid (?), a. (Zoöl.) Of, pertaining to, or like, Trachinus, a
genus of fishes which includes the weevers. See Weever.
||Tra*chi"tis (?), n. [NL.] (Med.) Tracheitis.
||
Tra`chy*car"pous (?), a. [Gr. &?; rough + &?; fruit.] (Bot.)
Rough-fruited. Gray.
||Tra`chy*me*du"sæ (?), n. pl. [NL., fr.Gr. &?; rough + medusa.]
||(Zoöl.) A division of acalephs in which the development is direct
||from the eggs, without a hydroid stage. Some of the species are
||parasitic on other medusæ.
||
Tra`chy*sper"mous (?), a. [Gr. &?; rough + &?; seed.] (Bot.)
Rough-seeded. Gray.
||Tra`chy*stom"a*ta (?), n. pl. [NL., fr. Gr. &?; rough + stoma.]
||(Zoöl.) An order of tailed aquatic amphibians, including Siren and
||Pseudobranchus. They have anterior legs only, are eel-like in form,
||and have no teeth except a small patch on the palate. The external
||gills are persistent through life.
||
Tra"chyte (?), n. [Gr. &?; rough, rugged: cg. F. trachyte.] (Geol.) An
igneous rock, usually light gray in color and breaking with a rough
surface. It consists chiefly of orthoclase feldspar with sometimes
hornblende and mica.
Tra*chyt"ic (?), a. [Cf. F. trachytique.] Of, pertaining to, or
resembling, trachyte.
Trach"y*toid (?), a. [Trachyte + - oid.] (Min.) Resembling trachyte; —
used to define the structure of certain rocks.
Tra"cing (?), n. 1. The act of one who traces; especially, the act of
copying by marking on thin paper, or other transparent substance, the
lines of a pattern placed beneath; also, the copy thus producted.