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One who, or that which, operates or produces an effect.

A laboratory. [Obs.]

One who labors jointly with others to promote the same end. "Coöperators with the truth." Boyle.

A cooperator. [R.] Success unto our valiant general, And happiness to his accomplices! Shak.

who buys and sells notes and bills of exchange. -- Curbstone broker or Street broker, an operator in stocks (not a member of the Stock Exchange) who executes orders by running from office to office, or by transactions on the street. [U.S.] -- Exchange broker, one who buys and sells uncurrent money, and deals in exchan…

nstrument, with a long bent shank set in a handle which rests against the shoulder of the operator. It is operated by a thrust movement, and used in paring the hoofs of horses.

One who manages the running of an automobile; esp., the paid operator of a motor vehicle.

as water, an instrument, or part of a machine, or for directing the hand or eye, as of an operator; as:

ce, at the place where a wire enters a building, for preventing injury by lightning to an operator or instrument. It consists of a short circuit to the ground interrupted by a thin nonconductor over which lightning jumps. Called also lightning discharger. -- Lightning bug (Zoöl.), a luminous beetle. See Firefly. -- L…

s a dairyman does his stock. London Spectator. To milk the street, to squeeze the smaller operators in stocks and extract a profit from them, by alternately raising and depressing prices within a short range; -- said of the large dealers. [Cant] -- To milk a telegram, to use for one's own advantage the contents of a te…

One who sends telegraphic messages; a telegraphic operator; a telegraphist.

distant point or points by means of alternating currents of electricity controlled by an operator who plays on a keyboard. The music is produced by a receiving instrument similar or analogous to the telephone, but not held to the ear. The pitch corresponds with frequency of alternation of current.

ey will be exploded when touched by a vessel, or when an electric circuit is closed by an operator on shore.

An instrument for writing by means of type, a typewheel, or the like, in which the operator makes use of a sort of keyboard, in order to obtain printed impressions of the characters upon paper.