Wiktionary
methyl methacrylate
n. (context organic compound English) The methyl ester of methacrylic acid, CH2:C(CH3)COOCH3, used as a monomer in the manufacture of polymethyl methacrylate plastics.
Wikipedia
Methyl methacrylate
Methyl methacrylate (MMA) is an organic compound with the formula CH=C(CH)COOCH. This colourless liquid, the methyl ester of methacrylic acid (MAA) is a monomer produced on a large scale for the production of poly(methyl methacrylate) (PMMA).
Methyl methacrylate (data page)
This page provides supplementary chemical data on Methyl methacrylate.