In`com*bus"ti*ble (?), 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.
Incombustible cloth, a tissue of amianthus or asbestus; also, a fabric imbued with an incombustible substance.
-- In`com*bus"ti*ble*ness, n. -- In`com*bus"ti*bly, adv.
© Webster 1913.