Word Study
incombustible
CIDE DICTIONARY
incombustible, a. [Pref. in- not + combustible: cf. F. incombustible.].
Not combustible; not capable of being burned, decomposed, or consumed by fire; uninflammable; as, asbestus is an incombustible substance; carbon dioxide is an incombustible gas. [1913 Webster]
OXFORD DICTIONARY
incombustible, adj. that cannot be burnt or consumed by fire.
Derivative
incombustibility n.
Etymology
ME f. med.L incombustibilis (as IN-(1), COMBUSTIBLE)
ROGET THESAURUS
incombustible
Insulation
N insulation, fire extinction, insulation, incombustible material, noncombustible material, fire retardant, flame retardant, fire wall, fire door, incombustibility, incombustibleness, extincteur, fire annihilator, amianth, amianthus, earth-flax, mountain-flax, asbestos, fireman, fire fighter, fire eater, fire department, fire brigade, engine company, pumper, fire truck, hook and ladder, aerial ladder, bucket, fire hose, fire hydrant, backfire, firebreak, trench, aerial water bombardment, wet blanket, fire extinguisher, soda and acid extinguisher, dry chemical extinguisher, CO-two extinguisher, carbon tetrachloride, foam, sprinklers, automatic sprinkler system, fire bucket, sand bucket, fire alarm, evacuation alarm, fire code, fire regulations, fire, fire inspector, code violation, citation, incombustible, nonflammable, uninflammable, unflammable, fireproof, fight fire with fire.For further exploring for "incombustible" in Webster Dictionary Online