INCOMBUSTIBLE

noncombustible, incombustible

(adjective) not capable of igniting and burning

Source: WordNet® 3.1

Etymology

Adjective

incombustible (comparative more incombustible, superlative most incombustible)

Not capable of catching fire and burning; not flammable.

Antonyms

• (not flammable): combustible, flammable (US), inflammable (UK)

Noun

incombustible (plural incombustibles)

Any substance that is not flammable.

Source: Wiktionary

In`com*bus"ti*ble, a. Etym: [Pref. in- not + combustible: cf. F. incombustible.]

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition