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Calculus of operations. See under
Calculus.

Op"er*a*tive (?), a. [Cf.L.
operativus, F. opératif.] 1.
Having the power of acting; hence, exerting force, physical or
moral; active in the production of effects; as, an operative
motive.

It holds in all operative
principles.

2. Producing the appropriate or designed
effect; efficacious; as, an operative dose, rule, or
penalty.

3. (Surg.) Based upon, or consisting
of, an operation or operations; as, operative
surgery.

Op"er*a*tive, n. A skilled worker;
an artisan; esp., one who operates a machine in a mill or
manufactory.

Op"er*a*tive*ly, adv. In an
operative manner.

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.


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