D defs.my
Entry 1 sense Webster, 1913

Diacid

· Di·ac·id · IPA
01 a. Divalent; -- said of a base or radical as capable of saturating two acid monad radicals or a dibasic acid. Cf. Dibasic, a., and Biacid.
  1. 1.
    Divalent; -- said of a base or radical as capable of saturating two acid monad radicals or a dibasic acid. Cf. Dibasic, a., and Biacid.(Chem.) See: Dibasic, Biacid