Webster's Revised Unabridged Dictionary (1913)

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Operator (Page: 1005)

Op"er*a`tor (?), n. [L.]

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

2. (Surg.) One who performs some act upon the human body by means of the hand, or with instruments.

3. A dealer in stocks or any commodity for speculative purposes; a speculator. [Brokers' Cant]

4. (Math.) The symbol that expresses the operation to be performed; -- called also facient.