addend

[n] - a number that is added to another number (the augend)
Found on http://www.webdictionary.co.uk/definition.php?query=addend

addend

See addition reaction.
Found on http://www.chem.qmul.ac.uk/iupac/gtpoc/A.html

addend

noun a number that is added to another number (the augend)
Found on https://www.encyclo.co.uk/local/20974
No exact match found