deflagration

 
Pronunciation: /dɛfləˈɡreɪʃ(ə)n/

noun

[mass noun]
  • the action of heating a substance until it burns away rapidly.
  • technical combustion which propagates through a gas or across the surface of an explosive at subsonic speeds, driven by the transfer of heat. Compare with detonation.

Origin:

early 17th century: from Latin deflagratio(n-), from the verb deflagrare (see deflagrate)