adjective Chemistry.

  1. capable of combining with two molecules of a monobasic acid.
  2. (of an acid or a salt) having two replaceable hydrogen atoms.


  1. another word for diacidic
  2. (of a salt or acid) containing two acidic hydrogen atomsNaH 2 PO 4 is a diacid salt of phosphoric acid


  1. an acid or salt that contains two acidic hydrogen atoms
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