Intrusive rocks(Geol.), rocks which have been forced, while in a plastic or melted state, into the cavities or between the cracks or layers of other rocks. The term is sometimes used as equivalent to plutonic rocks. It is then contrasted with effusive or volcanic rocks.

In*tru"sive*ly, adv.In*tru"sive*ness, n.

(In*trust") v. t. [imp. & p. p. Intrusted, p. pr. & vb. n. Intrusting.] To deliver (something) to another in trust; to deliver to (another) something in trust; to commit or surrender (something) to another with a certain confidence regarding his care, use, or disposal of it; as, to intrust a servant with one's money or intrust money or goods to a servant.

Syn. — To commit; consign; confide. See Commit.

(In`tu*ba"tion) n. [Pref. in- in + tube.] (Med.) The introduction of a tube into an organ to keep it open, as into the larynx in croup.

(In`tu*i"tion) n. [L. intuitus, p. p. of intueri to look on; in- in, on + tueri: cf. F. intuition. See Tuition.]

1. A looking after; a regard to. [Obs.]

What, no reflection on a reward! He might have an intuition at it, as the encouragement, though not the cause, of his pains.

2. Direct apprehension or cognition; immediate knowledge, as in perception or consciousness; — distinguished from "mediate" knowledge, as in reasoning; as, the mind knows by intuition that black is not white, that a circle is not a square, that three are more than two, etc.; quick or ready insight or apprehension.

Sagacity and a nameless something more, — let us call it intuition.

3. Any object or truth discerned by direct cognition; especially, a first or primary truth.

(In*trud"ress) n. A female intruder.

(In*trunk") v. t. To inclose as in a trunk; to incase. [R.] Ford.

(In*tru"sion) n. [Cf. F. intrusion. See Intrude.]

1. The act of intruding, or of forcing in; especially, the forcing (one's self) into a place without right or welcome; encroachment.

Why this intrusion?
Were not my orders that I should be private?

2. (Geol.) The penetrating of one rock, while in a plastic or metal state, into the cavities of another.

3. (Law) The entry of a stranger, after a particular estate or freehold is determined, before the person who holds in remainder or reversion has taken possession.

4. (Scotch Ch.) The settlement of a minister over a congregation without their consent.

(In*tru"sion*al) a. Of or pertaining to intrusion.

(In*tru"sion*ist), n. One who intrudes; especially, one who favors the appointment of a clergyman to a parish, by a patron, against the wishes of the parishioners.

(In*tru"sive) a. Apt to intrude; characterized by intrusion; entering without right or welcome.

  By PanEris using Melati.

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