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methyl (n.)

univalent hydrocarbon radical, 1840, from German methyl (1840) or directly from French méthyle, back-formation from French méthylène (see methylene). Ultimately from Greek methy "wine" + hylē "wood." 

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Definitions of methyl from WordNet

methyl (n.)
the univalent radical CH3- derived from methane;
Synonyms: methyl group / methyl radical
From wordnet.princeton.edu