メチル基きMeanings1nounmethyl groupChemical term for the functional group –CH₃. Used in organic chemistry contexts.メチル基きは有ゆう機き化か学がくで最もっとも基き本ほん的てきな置ち換かん基きの一ひとつです。The methyl group is one of the most fundamental substituents in organic chemistry.