| tribasic acid | (n) an acid containing three replaceable hydrogen atoms per molecule |
| trisodium phosphate | (n) the tertiary phosphate of sodium used as a builder in soaps and detergents, Syn. tribasic sodium phosphate, trisodium orthophosphate |
| Tribasic | 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 ] |