operand

Etymology

It is borrowed from Latin operandum (“something to be worked on”),^{[2][3][4][5][6]} the neuter gerundive of operor (“to work”),^[2][4][5][6] a verb that in Late Latin also meant to have effect, to be active, to cause.^[6] The verb comes from opera (“work, effort”), related to opus (“a work”), from Proto-Indo-European *op- (“to work, produce in abundance”).^[6][4] The OED compares the English suffix -and, and Dictionary.com calls the Latin form Late Latin.^[2][7]

Earliest recorded meaning

A quantity or symbol on which a mathematical operation is performed: 1846, in W. R. Hamilton, according to the entry the OED revised in 2004.^[2] Merriam-Webster Unabridged gives 1853,^[8] and Barnhart and Etymonline give 1886.^[5][6]

Semantic evolution

The word began as a term of mathematics, and the Latin form says exactly what it names, the thing to be operated on.^[2][3] It was applied in logic too, for what a logical operator acts on and for that operator's scope.^[8][2][9] In computing it came to mean the part of an instruction that specifies the quantities to be handled, or those quantities themselves.^[8]

Timeline

• 1846 – the quantity or symbol on which an operation is performed.^[2] Merriam-Webster Unabridged dates the mathematical sense to 1853,^[8] and Etymonline and Barnhart to 1886.^[6][5]

Meanings

Noun

1. A quantity or function on which a mathematical or logical operation is performed.^[3][8][2]
2. (logic) What an operator acts on; the scope of an operator.^[8]
3. The part of a computer instruction that indicates the quantities to be operated on; also, one of those quantities.^[8]

Related words

• operate
• operation
• operator
• opus
• opera

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins
4. ^ a b c The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
5. ^ a b c d Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
6. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
7. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
8. ^ a b c d e f g Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
9. ^ Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press