succinic acid Europe::363 An alpha,omega-dicarboxylic acid resulting from the formal oxidation of each of the terminal methyl groups of butane to the corresponding carboxy group. It is an intermediate metabolite in the citric acid cycle. Codex::363 An α,ω-dicarboxylic acid resulting from the formal oxidation of each of the terminal methyl groups of butane to the corresponding carboxy group. It is an intermediate metabolite in the citric acid cycle. LanguaL term definition: Food additive; technological purpose(s): acidity regulator. alpha,omega-dicarboxylic acid C4-dicarboxylic acid food additive