combustible (
http://definr.com/combustible)
adj 1: capable of igniting and burning [ant:
noncombustible]
2: (of fuel) highly combustible; having a high proportion of
fuel to air; "a rich gas mixture"
n : a substance that can be burned to provide heat or power;
"more fuel is needed during the winter months"; "they
developed alternative fuels for aircraft" [syn:
fuel, {combustible
material}]