augend
Pronunciation: /ˈɔːdʒɛnd/
noun
Mathematics & Computing- the number to which another is added: we can begin with the combination in which both the addend and the augend are 0's but the carry bit from the previous column is a 1Compare with addend.

Origin:
late 19th century: via German from Latin augendus, gerundive of augere 'to increase'