The Collaborative International Dictionary
Deflagrability
Deflagrability \Def`la*gra*bil"i*ty\, n. (Chem.) The state or quality of being deflagrable.
The ready deflagrability . . . of saltpeter.
--Boyle.
Wiktionary
deflagrability
n. (context chemistry archaic English) The quality of being deflagrable.