thermobaric
Concise Oxford English Dictionary © 2008 Oxford University Press:
thermobaric /ˌθəːməʊˈbarɪk/
▶adjective denoting a very large fuel–air bomb which ignites into a fireball when detonated, creating a powerful wave of pressure that sucks out oxygen from any confined spaces nearby.
'thermobaric' also found in these Oxford entries:

