The Collaborative International Dictionary of English v.0.48:

Carbureted \Car"bu*ret`ed\, a.
   1. (Chem.) Combined with carbon in the manner of a carburet
      or carbide.
      [1913 Webster]

   2. Saturated or impregnated with some volatile carbon
      compound; as, water gas is carbureted to increase its
      illuminating power. [Written also carburetted.]
      [1913 Webster]

   Carbureted hydrogen gas, any one of several gaseous
      compounds of carbon and hydrogen, some of with make up
      illuminating gas.

   Light carbureted hydrogen, methane (CH4), also called
      marsh gas, and fire damp.
      [1913 Webster +PJC] Carburetor

The Collaborative International Dictionary of English v.0.48:

Carburet \Car"bu*ret\, v. t. [imp. & p. p. Carbureted or
   Carburetted (?); p. pr. & vb. n. Carbureting or
   Carburetting.]
   To combine or to impregnate with carbon, as by passing
   through or over a liquid hydrocarbon; to carbonize or
   carburize.
   [1913 Webster]

         By carbureting the gas you may use poorer coal.
                                                  --Knight.
   [1913 Webster]