The Collaborative International Dictionary
noncombustible \noncombustible\ adj. Not combustible; not able to burn; as, drapery should be made of noncombustible materials. Opposite of combustible.
Syn: incombustible.
Wiktionary
a. That will not readily ignite and burn
WordNet
adj. not capable of igniting and burning [syn: incombustible] [ant: combustible]
Usage examples of "noncombustible".
Poliorcetes had developed in Macedonia centuries before: an enormous tower constructed of strong wooden beams and covered with hides, green wicker, mud, and other noncombustible materials.
Its descent indicated the special bulkheaded envelope of noncombustible gas had been pierced in many places.
But it was sustained by a new type of noncombustible gas of the greatest lifting capacity.
Although oil-soaked and tarry torches are used for illumination, they are restrained from burning as brightly as they might otherwise, as the oil and tar are in some fashion diluted with a noncombustible substance.