operator

operator is a   Noun

Definition:

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

[2] 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] The symbol that expresses the operation to be performed; -- called also facient.

Synonyms: