a mixture of finely-divided metallic aluminum and ferric oxide that when ignited produces extremely high temperatures as the result of the union of the aluminum with the oxygen of the oxide: used in welding, incendiary bombs, etc.

Origin of thermite

First recorded in 1895–1900; therm- + -ite1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for thermite

Historical Examples of thermite

  • And let me tell you—you are not the only man in New York who knows the secret of thermite.

    The Silent Bullet

    Arthur B. Reeve

  • The thermite was piled generously in a ridge all the way around.

    The Metal Moon

    Everett C. Smith

  • He leveled his pistol at the thermite ridge where it was nearest to him.

    The Metal Moon

    Everett C. Smith

  • It must have been a thermite bomb—nothing but thermite could be that hot.


    Lester del Rey

  • But this accursed flaming English thermite could catch you at four miles.

    Tales of War

    Lord Dunsany