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rusion; entering without right or welcome. 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. -- I…

Of no force, weight, or cogency; not valid; weak.

To render invalid; to weaken or lessen the force of; to destroy the authority of; to render of no force or effect; to overthrow; as, to invalidate an agreement or argument.

Want of validity or cogency; want of legal force or efficacy; invalidness; as, the invalidity of an agreement or of a will.

The act of surrounding, blocking up, or besieging by an armed force, or the state of being so surrounded. The capitulation was signed by the commander of the fort within six days after its investments. Marshall.

adjectives. It denotes relation, resemblance, similarity, and sometimes has a diminutive force; as, selfish, boyish, brutish; whitish, somewhat white.

Of, pertaining to, having, or denoting, equality of force. Isodynamic foods (Physiol.), those foods that produce a similar amount of heat. -- Isodynamic lines (Magnetism), lines on the earth's surface connecting places at which the magnetic intensity is the same.

Of equal force or size.

s, lines showing, in a diagram, the relations of temperature and volume, when the elastic force is constant; -- called also isobars.

To pass or flow out; to run out, as from any inclosed place. From it issued forced drops of blood. Shak.

. Three species occur on the Atlantic coast. The jagers pursue other species of gulls and force them to disgorge their prey. The two middle tail feathers are usually decidedly longer than the rest. Called also boatswain, and marline-spike bird. The name is also applied to the skua, or Arctic gull (Megalestris skua).…

rsal. -- Joint hinge, a hinge having long leaves; a strap hinge. -- Joint splice, a reënforce at a joint, to sustain the parts in their true relation. -- Joint stool. (a) A stool consisting of jointed parts; a folding stool. Shak. (b) A block for supporting the end of a piece at a joint; a joint chair. -- Out of jo…

To push; to drive; to force by running against; to jostle. We justled one another out, and disputed the post for a great while. Addison.

That part of the plastering which is forced through between the laths and holds the rest in place.

To take (any one) by force or fear, and against one's will, with intent to carry to another place. Abbott. You may reason or expostulate with the parents, but never attempt to kidnap their children, and to make proselytes of them. Whately.

A unit of electromotive force equal to one thousand volts.

A unit of force equal to the force which, acting for one second, will give a pound a velocity of one foot per second; -- proposed by J.D.Everett, an English physicist.

defeat, as a scheme or project; to frustrate; to quash. [Colloq.] -- To knock off. (a) To force off by a blow or by beating. (b) To assign to a bidder at an auction, by a blow on the counter. (c) To leave off (work, etc.). [Colloq.] -- To knock out, to force out by a blow or by blows; as, to knock out the brains. -- T…

Of force sufficient to fell or completely overthrow; as, a knockdown blow; a knockdown argument. [Colloq.]

ce, usually of brass or iron, and furnished with points, worn to protect the hand, to add force to a blow, and to disfigure the person struck; as, brass knuckles; -- called also knuckle duster. [Slang.] Knuckle joint (Mach.), a hinge joint, in which a projection with an eye, on one piece, enters a jaw between two corre…