operand

noun
op·​er·​and | \ ˌä-pə-ˈrand How to pronounce operand (audio) \

Definition of operand

: something (such as a quantity or data) that is operated on (as in a mathematical operation) also : the address in a computer instruction of data to be operated on

First Known Use of operand

1853, in the meaning defined above

History and Etymology for operand

oper(ate) + -and (as in multiplicand)

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The first known use of operand was in 1853

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