Silicide \Sil"i*cide\, n. (Chem.) A binary compound of silicon, or one regarded as binary. [R.] {Hydrogen silicide} (Chem.), a colorless, spontaneously inflammable gas, {SiH4}, produced artifically from silicon, and analogous to methane; -- called also {silico-methane}, {silicon hydride}, and formerly {siliciureted hydrogen}.