/ (ˌθɜːməʊˈbærɪk) /
(of an explosive device or explosion) detonated by means of an explosive substance reacting spontaneously with air
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for thermobaric
Thermobaric explosive weapons, like the BLU-119/B “CrashPad” are another option.Destroying Syrian Chemical Stockpiles Won’t Be Easy, May Kill Civilians|Chris Miller|September 6, 2013|DAILY BEAST
Meanwhile, the CIA has acquired a thermobaric weapon that creates a pressure wave that kills humans but leaves property undamaged.