water gas

noun
1.
a toxic gaseous mixture consisting chiefly of carbon monoxide and hydrogen, prepared from steam and incandescent coke: used as an illuminant, fuel, and in organic synthesis.
Also called blue gas.
Origin
1850-55
Related forms
water-gas, adjective
British Dictionary definitions for water gas

water gas

noun
1.
a mixture of hydrogen and carbon monoxide produced by passing steam over hot carbon, used as a fuel and raw material See also producer gas