Part 622

2. (Surv.) (a) The act or process of making a plot on paper. (b) A plot on paper.

Pro*tract"ive (?), a. Drawing out or lengthening in time; prolonging; continuing; delaying.

He suffered their protractive arts.

Dryden.

Pro*tract"or (?), n. 1. One who, or that which, protracts, or causes protraction.

2. A mathematical instrument for laying down and measuring angles on paper, used in drawing or in plotting. It is of various forms, semicircular, rectangular, or circular.

3. (Surg.) An instrument formerly used in extracting foreign or offensive matter from a wound.

4. (Anat.) A muscle which extends an organ or part; -- opposed to retractor.

5. An adjustable pattern used by tailors. Knight.

Pro*trep"tic*al (?), a. [Gr. &?;, fr. &?; to turn forward, to urge on.] Adapted to persuade; hortatory; persuasive. [Obs.] Bp. Ward.

Pro*trud"a*ble (?), a. That may be protruded; protrusile. Darwin.

Pro*trude" (?), v. t. [imp. & p. p. Protruded; p. pr. & vb. n. Protruding.] [L. protrudere, protrusum; pro forward + trudere to thrust. See Threat.]

1. To thrust forward; to drive or force along. Locke.

2. To thrust out, as through a narrow orifice or from confinement; to cause to come forth.

When . . . Spring protrudes the bursting gems.

Thomson.

Pro*trude", v. i. To shoot out or forth; to be thrust forward; to extend beyond a limit; to project.

The parts protrude beyond the skin.

Bacon.

Pro*tru"sile (?), a. Capable of being protruded or thrust out; protractile; protrusive.

Pro*tru"sion (?), n. 1. The act of protruding or thrusting forward, or beyond the usual limit.

2. The state of being protruded, or thrust forward.

Pro*tru"sive (?), a. 1. Thrusting or impelling forward; as, protrusive motion. E. Darwin.

2. Capable of being protruded; protrusile.

Pro*tru"sive*ly, adv. In a protrusive manner.

Pro*tu"ber*ance (?), n. [Cf. F. protubÈrance. See Protuberant.] That which is protuberant swelled or pushed beyond the surrounding or adjacent surface; a swelling or tumor on the body; a prominence; a bunch or knob; an elevation.

Solar protuberances (Astron.), certain rose-colored masses on the limb of the sun which are seen to extend beyond the edge of the moon at the time of a solar eclipse. They may be discovered with the spectroscope on any clear day. Called also solar prominences. See Illust. in Append.

Syn. -- Projection, Protuberance. protuberance differs from projection, being applied to parts that rise from the surface with a gradual ascent or small angle; whereas a projection may be at a right angle with the surface.