The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
a. [ Pref. tri- + basic. ] (Chem.) Capable of neutralizing three molecules of a monacid base, or their equivalent; having three hydrogen atoms capable of replacement by basic elements on radicals; -- said of certain acids; thus, citric acid is a tribasic acid. [ 1913 Webster ]
WordNet (3.0) WordNet (3.0)
(n) an acid containing three replaceable hydrogen atoms per molecule
(n) the tertiary phosphate of sodium used as a builder in soaps and detergents, Syn. tribasic sodium phosphate, trisodium orthophosphate
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