The Collaborative International Dictionary of English v.0.48:

Silicide \Sil"i*cide\, n. (Chem.)
   A binary compound of silicon, or one regarded as binary. [R.]
   [1913 Webster]

   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.
      [1913 Webster]

WordNet (r) 3.0 (2006):

silicide
    n 1: any of various compounds of silicon with a more
         electropositive element or radical