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TRA'CHE-O-CELE, n. [trachea and κηλη, a tumor.]

An enlargement of the thyroid gland; bronchocele or goiter. Cyc.

TRA-CHE-OT'O-MY, n. [trachea and τεμνω, to cut.]

In surgery, the operation of making an opening into the windpipe. Cyc.

TRA'CHYTE, n. [Gr. τραχυς, rough.]

A species of volcanic rock, composed of crystals of glassy feldspar, sometimes with crystals of hornblend, mica, iron pyrite, &c. Daubeny. Journ. of Science.


Pertaining to trachyte, or consisting of it.


Course; regular track or path. Davies.

TRAC-ING, ppr. [from trace.]

Marking out; drawing in lines; following by marks or footsteps. Tracing lines, in a ship, are lines passing through a block or thimble, and used to hoist a thing higher.

TRACK, n. [It. traccia; Sp. traza; Fr. trace. See Trace. Track is properly a mark made by drawing, not by stepping; the latter is a derivative sense.]

  1. A mark left by something that has passed along; as, the track of a ship, a wake; the track of a meteor; the track of a sled or sleigh.
  2. A mark or impression left by the foot, either of man or beast. Savages are said to be wonderfully sagacious in finding the tracks of men in the forest.
  3. A road; a beaten path. Behold Torquatus the same track pursue. Dryden.
  4. Course; way; as, the track of a comet.

TRACK, v.t.

  1. To follow when guided by a trace, or by the footsteps, or marks of the feet; as, to track a deer in the snow.
  2. To tow; to draw a boat on the water in a canal.


A drawing or towing, as of a boat.


Followed by the footsteps.


Following by the impression of the feet; drawing a boat; towing.


Having no track; marked by no footsteps; untrodden; as, a trackless desert.


So as to leave no track.


The state of being without a track.

TRACK'-ROAD, n. [track and road.]

A towing-path. Cyc.

TRACK'-SCOUT, n. [track and D. schuit, boat.]

A boat or vessel employed on the canals in Holland, usually drawn by a horse. Cyc.

TRACT, n. [L. tractus; It. tratto; Fr. trait; from L. traho, Fr. traire, to draw.]

  1. Something drawn out or extended.
  2. A region, or quantity of land or water, of indefinite extent. We may apply tract to the sandy and barren desert of Syria and Arabia, or to the narrow vales of Italy and Sardinia. We say, a rich tract of land in Connecticut or Ohio, a stony tract, or a mountainous tract. We apply tract to a single farm, or to a township or state.
  3. A treatise; a written discourse or dissertation of indefinite length, but generally not of great extent.
  4. In hunting, the trace or footing of a wild beast. Cyc.
  5. Treatment; exposition. [Not in use.] Shak.
  6. Track. [Not in use.]
  7. Continuity or extension of any thing; as, a tract of speech. [Not much used.]
  8. Continued or protracted duration; length; extent; as, a long tract of time. Milton.

TRACT, v.t.

To trace out; to draw out. [Not in use.]

TRACT-A-BIL'I-TY, n. [from tractable.]

The quality or state of being tractable or docile; docility; tractableness. Beddoes.

TRACT'A-BLE, a. [L. tractabilis, from tracto, to handle or lead; Fr. traitable; It. trattabile.]

  1. That may be easily led, taught or managed; docile; manageable, governable; as, tractable children; a tractable learner. Locke.
  2. Palpable; such as may be handled; as, tractable measures. Holder.


The state or quality of being tractable or manageable; docility; as, the tractableness of children. Locke.


In a tractable manner; with ready compliance.

TRACT'ATE, n. [L. tractatus.]

A treatise; a tract. [Not now in use.] Brown. Hale.

TRACT-A'TION, n. [L. tractatio.]

Treatment or handling of a subject; discussion. Bp. Hall.


In geometry, a curve line.