a colourless crystalline water-soluble substance used in the manufacture of acrylic resins; 2-methylpropenoic acid. Formula: CH2:C(CH3)COOH
methacrylic acid in American English
(ˌmɛθəˈkrɪlɪk)
a colorless liquid, CH2:C(CH3)COOH, prepared by treating acetone cyanohydrin with dilute sulfuric acid: it is readily polymerized and is used in making synthetic resins