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opera buffa
opéra comique
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operand

op·er·and [ óppə rànd ] (plural op·er·ands)


noun 
Definition:
 
1. entity with operation performed on it: a quantity, function, or other entity that is to have a mathematical operation performed on it

2. part of computer instruction: the portion of a computer instruction that specifies the location in memory of the data to be manipulated

[Late 19th century. < Latin operandum "thing to be worked on" < operari (see operate)]
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