METHYL Meaning of METHYL in English [ 'mi:θʌɪl , 'mɛθ- , -θɪl ]■ noun [as modifier ] Chemistry of or denoting the alkyl radical ‒CH 3 , derived from methane.OriginC19: back-form. from ~ene . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004