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An operation by which any part is separated from the rest. [Obs.] Dunglison.

ir; as, an apneumatic lung; also, effected by or with exclusion of air; as, an apneumatic operation.

ve; any complex instrument or appliance, mechanical or chemical, for a specific action or operation; machinery; mechanism.

making inductions, drawing conclusions, and applying them to the case in discussion; the operation of inferring propositions, not known or admitted as true, from facts or principles known, admitted, or proved to be true. Which manner of argumentation, how false and naught it is, . . . every man that hath with perceive…

A low fire used in chemical operations.

nd ladies spake aside. Sir W. Scott. To set aside (Law), to annul or defeat the effect or operation of, by a subsequent decision of the same or of a superior tribunal; to declare of no authority; as, to set aside a verdict or a judgment.

To come into legal operation in connection with anything; to vest; as, dower will attach. Cooley.

The act or property of attracting; the effect of the power or operation of attraction. Newton.

A quantity introduced for the purpose of simplifying or facilitating some operation, as in equations or trigonometrical formulæ. Math. Dict.

An overseer or under steward of an estate, who directs husbandry operations, collects rents, etc. [Eng.]

r tract of country, protected by fortifications, or by natural advantages, from which the operations of an army proceed, forward movements are made, supplies are furnished, etc.

A quantity of anything produced at one operation; a group or collection of persons or things of the same kind; as, a batch of letters; the next batch of business. "A new batch of Lords." Lady M. W. Montagu.

A train of artillery for siege operations.

itant of; esp. to have a legal residence, settlement, or inhabitancy, whether by birth or operation of law, so as to be entitled to maintenance by the parish or town. Bastards also are settled in the parishes to which the mothers belong. Blackstone.

A piece of metal prepared to be made into something by a further operation, as a coin, screw, nuts.

elivery end of a blast pipe; -- called also blast orifice. -- In full blast, in complete operation; in a state of great activity. See Blast, n., 2. [Colloq.]

A running or issuing of blood, as from the nose or a wound; a hemorrhage; the operation of letting blood, as in surgery; a drawing or running of sap from a tree or plant.

A single heat or operation of the Bessemer converter. Raymond.

illiant blue flame; -- used in pyrotechnics and as a night signal at sea, and in military operations. -- Blue mantle (Her.), one of the four pursuivants of the English college of arms; -- so called from the color of his official robes. -- Blue mass, a preparation of mercury from which is formed the blue pill. McElrat…

The breast, considered as the seat of the passions, affections, and operations of the mind; consciousness; se Tut, I am in their bosoms, and I know Wherefore they do it. Shak. If I covered my transgressions as Adam, by hiding my iniquity in my bosom. Job xxxi. 33.