The Collaborative International Dictionary of English v.0.48:
oxalacetic acid \oxalacetic acid\ n. (Chem.) A dicarboxylic acid (HO.CO.CO.CH2.CO.OH). [WordNet 1.5]WordNet (r) 3.0 (2006):
oxalacetic acid n 1: an acid formed by oxidation of maleic acid (as in metabolism of fats and carbohydrates) [syn: oxalacetic acid, oxaloacetic acid]