Incombustible adj. 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.
... reason of the incendiary and explosive missiles whereby 'les petits bailments a vapeur pouront attaquer les plus gros vaisseaux.' It is impossible to retaliate by using similar weapons. Forts and batteries are incombustible. Recourse must therefore be had to other means, whereby to overcome fortifications protecting ... — The Life of Thomas, Lord Cochrane, Tenth Earl of Dundonald, Vol. II • Thomas Lord Cochrane Read full book for free!