1. diacid - Noun
2. diacid - Adjective
Divalent; -- said of a base or radical as capable of saturating two acid monad radicals or a dibasic acid. Cf. Dibasic, a., and Biacid.
Source: Webster's dictionaryAnother component of all such catalysts is an organic modifier, usually an ester of an aromatic diacid or a diether. Source: Internet
In keeping with this naming convention, "nylon 6,12" or "PA 612" is a copolymer of a 6C diamine and a 12C diacid. Source: Internet
Short aliphatic dialdehydes are sometimes named after the diacid from which they can be derived. Source: Internet