異い符ふ号ごういふごうMeanings1noun, noun which may take the genitive case particle 'no'opposite sign; having opposite signsmathematics›Mathematics term. Describes two numbers or quantities with opposite signs (one positive, one negative). Often used in the pattern 異符号の or as a noun.See also: 同符号異い符ふ号ごうの数かずを足たすときは、絶