Noun
depressurization (usually uncountable, plural depressurizations)
The act, or an instance, of depressurizing; a reduction of atmospheric pressure within a chamber or space vehicle etc.
Antonym: pressurization
Generally indoor radon can be mitigated by sub-slab depressurization and exhausting such radon-laden air to the outdoors, away from windows and other building openings. Source: Internet
The most serious alleged lapse is a failure to repair cracks to pressure bulkheads; the rupture of a bulkhead could lead to cabin depressurization. Source: Internet
This eliminates the constant volume problem, reduces the possibility of a space suit depressurization and gives a very lightweight suit. Source: Internet