The Collaborative International Dictionary
Methide
Methide \Meth"ide\ (? or ?), n. [See Methyl.] (Chem.) A binary compound of methyl with some element; as, aluminium methide, Al2(CH3)6.
Wiktionary
methide
n. (context organic chemistry English) Any binary compound of the methyl radical and an electropositive element, especially a metal