adj. (Chem.) of or pertaining to the carboxyl group; having a carboxyl group (written -COOH, -CO2H or -CO.OH); as, carboxylic acids are weakly acidic. Syn. -- carboxyl. [ WordNet 1.5 ]
n. (Chem.) an organic compound whose acidity is due to the presence of a carboxyl gorup. Monocarboxylic acids (such as acetic acid or butyric acid) have one carboxyl group, dicarboxylic acids (such as oxalic acid or malonic acid) have two, tricarboxylic acids (such as citric acid) have three. [ PJC ]
a. [ Mono- + carbonic. ] (Chem.) Containing one carboxyl group; as, acetic acid is a monocarbonic acid. The more common term is monocarboxylic. Contrasted with dicarboxylic, tricarboxylic, etc. [ 1913 Webster +PJC ]
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