carbide

1. (chemistry) Any binary compound of carbon and a more electropositive element

2. (chemistry) The polyatomic ion C2−2, or any of its salts.

3. (chemistry) The monatomic ion C⁴⁻, or any of its salts.

4. (chemistry) A carbon-containing alloy or doping of a metal or semiconductor, such as steel.

5. (chemistry) Tungsten carbide.

6. (cycling) trivial name for calcium carbide (CaC₂), used to produce acetylene in bicycle lamps in the early 1900s.