(ˈ)meth+ noun
Etymology: International Scientific Vocabulary methacryl- (from methacrylic acid ) + -ate
1. : a salt or ester of methacrylic acid
2. or methacrylate resin or methacrylate plastic : an acrylic resin or acrylic plastic made by polymerization of a derivative of methacrylic acid ; especially : methyl methacrylate 2