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Definition of addend

addend

/ˈæd.ɛnd/
ad · dend
Plural:addends
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addend Lexical Profile

addend Game Scores & Validity

• noun

1

Any of a set of numbers or mathematical expressions to be added together to form a sum.

Example

"In the simple arithmetic equation 4 + 5 = 9, the numbers 4 and 5 are the addends and 9 is the sum."

2

A chemical moiety or molecule that is added to another molecule during a chemical reaction (chemistry).

Example

"Researchers analyzed how the fullerene core reacted with the organic addend to form a stable derivative."

Synonyms
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Antonyms
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• Nearby Words

add
addable
addax
addend
addendum
adder
addict

Word Origin & Etymology

Borrowed in the late 17th century from Latin 'addendus', the future passive participle of 'addere' (meaning 'to add'), literally translating to 'that which is to be added'.

Cite this Entry

Wordmom. (2026). Definition of Addend. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/addend
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