methyl

 
Pronunciation: /ˈmiːθʌɪl, ˈmɛθ-, -θɪl/

noun

[as modifier] Chemistry
  • of or denoting the alkyl radical CH3, derived from methane and present in many organic compounds: methyl bromide

Origin:

mid 19th century: from German Methyl or French méthyle, back-formations from German Methylen and French méthylène (see methylene)