maleic acidma·leic acid
a colorless, crystalline, poisonous acid, HOOCCH: CHCOOH, an isomer of fumaric acid, used in organic syntheses, in textile dyeing, etc.
Origin of maleic acid; from French maléique, altered (1834) by T. J. Pelouze (1807-67), French chemist ; from malique, malic (acid), to indicate a relationship between the two acids
A colorless crystalline acid, the cis-isomer of C4H4O4, used in textile processing and as an oil and fat preservative.
Origin of maleic acidFrom French acide maléique, alteration of acide malique, malic acid; see malic acid.