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opéra comique
opera glasses
opera hat
opera house
opera seria
operable
operagoer
operand
operant
operant conditioning
operate
operatic
operatics
operating cash flow
operating costs
operating cycle
operating exposure
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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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