'Polyacid' definitions:

Definition of 'Polyacid'

From: GCIDE

Polyacid \Pol`y*ac"id\, a. [Poly- + acid.] (Chem.) Capable of neutralizing, or of combining with, several molecules of a monobasic acid; having more than one hydrogen atom capable of being replaced by acid radicals; -- said of certain bases; as, calcium hydrate and glycerin are polyacid bases. [1913 Webster]