carbide

noun6

1. •
   Any binary compound of carbon and a more electropositive element
2. •
   The polyatomic ion C2−2, or any of its salts.
3. •
   The monatomic ion C⁴⁻, or any of its salts.
4. •
   Tungsten carbide.
5. •
   trivial name for calcium carbide (CaC₂), used to produce acetylene in bicycle lamps in the early 1900s.
6. •
   A carbon-containing alloy or doping of a metal or semiconductor, such as steel.