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.