a colorless liquid, CH:C(CH)COOH, prepared by treating acetone cyanohydrin with dilute sulfuric acid: it is readily polymerized and is used in making synthetic resins
Origin:
meth(yl) + acrylic
See methacrylic acid in American Heritage Dictionary 4
noun
A colorless liquid, CH2:C(CH3)COOH, used in the manufacture of resins and plastics.