methacrylic acid methacrylic • methadon · · · Info · Definitions · Synonyms · Characters · · methacrylic acid · · Text Common · · Latin · · Scripts 16 · · Length 6 · · Syllables Definitions · · · (noun) an unsaturated acid (C4H6O2) used to make resins and plastics. Synonyms: methacrylic acid, 2-methylpropenoic acid. · · Noun Definition 1 Synonyms · · · 2-methylpropenoic acid · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079