additive inverse

English Thesaurus

1. (mathematics) one of a pair of numbers whose sum is zero; the additive inverse of -5 is +5 (noun.linkdef)

hypernym	:	inverse, opposite,
definition	:	something inverted in sequence or character or effect (noun.linkdef)

domain category	:	math, mathematics, maths,
definition	:	a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement (noun.cognition)