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operating exposure
operating income
operating lease
operating leverage
operating microscope
operating risk
operating room
operating system
operating table
operating theatre
operation
operational
operational amplifier
operational area
operational audit
operational research
operationalism
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operant

op·er·ant [ óppərənt ]


noun  (plural op·er·ants)
Definition:
 
1. performer of operation: somebody or something that operates or that carries out some kind of operation

2. psychology voluntary action: in learning theory, an action or other unit of behavior that does not appear to have a stimulus



adjective 
Definition:
 
having effect: producing a specific effect

[Early 17th century. < Latin operant-, present participle of operari (see operate)]

op·er·ant·ly adverb
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