ADDEND
addend
(noun) a number that is added to another number (the augend)
Source: WordNet® 3.1
Etymology
Noun
addend (plural addends)
(mathematics) Any one of two or more numbers or other terms that are to be added together.
(organic chemistry) A moiety added to another molecule.
Synonyms
• (any of various terms added together): summand
Hypernyms
• term
Coordinate terms
• (term added to another): augend, sum
Verb
addend (third-person singular simple present addends, present participle addending, simple past and past participle addended)
To furnish with an addendum.
(organic chemistry) To furnish with an addend.
Source: Wiktionary