methylene group methylenedioxymethamphetamine • methylene iodide · · · Info · Definitions · Synonyms · Characters · · methylene group · · Text Common · · Latin · · Scripts 15 · · Length 4 · · Syllables Definitions · · · (noun) the bivalent radical CH2 derived from methane. Synonyms: methylene group, methylene radical, methylene. · · Noun Definition 1 Synonyms · · · methylene radical · · Synonym 1 methylene · · Synonym 2 Characters · · space U+0020 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079