CMU English Pronouncing Dictionary Dictionary [with local updates] CMU Pronouncing Dictionary
WordNet (3.0) WordNet (3.0)
(n) an acid containing four replaceable hydrogen atoms per molecule
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
a. [ Hexa- + basic. ] (Chem.) Having six hydrogen atoms or six radicals capable of being replaced or saturated by bases; -- said of acids;
a. [ Penta- + basic. ] (Chem.) Capable of uniting with five molecules of a monacid base; having five acid hydrogen atoms capable of substitution by a basic radical; -- said of certain acids. [ 1913 Webster ]
a. [ Tetra- + basic. ] (Chem.) Capable of neutralizing four molecules of a monacid base; having four hydrogen atoms capable of replacement by bases; quadribasic; -- said of certain acids; thus, normal silicic acid,
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