Meaning of thermite

ther•mite

Pronunciation: (thûr'mīt), [key]
— n.
  1. 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.