thermite

/ˈθɜː(ɹ).maɪt/

IPA: /TH ER1 M AY0 T/

noun
  1. 1

    A mixture of a metal and a metal oxide capable of producing a thermite reaction, such as aluminium metal and ferric oxide; used in incendiary devices.

Source: https://en.wiktionary.org/wiki/thermite