Describing various weapons that use atmospheric oxygen to produce a blast wave of a significantly longer duration than those produced by condensed explosives.

A thermobaric weapon

(weaponry) A weapon of a class of bombs, which causes a large explosion, with effects similar to a nuclear blast, by having an explosion, flash of heat, shockwave, producing a vacuum, and vacuum collapse pressure wave. Typically produced by aerosolizing a fuel throughout the air, and setting it alight, producing a detonation, that consumes all the oxygen in the region.