ˈmeˌthīd noun
( -s )
Etymology: meth- + -ide
1. : a binary compound of methyl usually with a metal
mercuric methide Hg(CH 3 ) 2
2. : a compound that contains a methylene group as part of a quinonoid structure and that is formed as an intermediate in the condensation of a phenol and formaldehyde to yield a resin
quinone methide O . C 6 H 4 . CH 2