1) Chemical compound 2) Compound 
A silicide is a compound that has silicon with (usually) more electropositive elements. Silicon is more electropositive than carbon. Silicides are structurally closer to borides than to carbides. Similar to borides and carbides, the composition of silicides cannot be easily specified as covalent molecules. The chemical bonds in silicides range fro...
• (n.) A binary compound of silicon, or one regarded as binary.
Sil'i·cide noun (Chemistry) A binary compound of silicon, or one regarded as binary. [ R.] Hydrogen silicide (Chemistry) , 
[n] - any of various compounds of silicon with a more electropositive element or radical
noun any of various compounds of silicon with a more electropositive element or radical