decompression
noun
de·com·pres·sion
| \ -ˈpresh-ən
\
\
Medical Definition of decompression
: the act or process of releasing from pressure or compression: as
a
: reduction of pressure:
(1)
: the decrease of ambient air pressure experienced in an air lock on return to atmospheric pressure after a period of breathing compressed air (as in a diving bell or caisson) or experienced in ascent to a great altitude without a pressure suit or pressurized cabin
(2)
: the decrease of water pressure experienced by a diver when ascending rapidly
b
: an operation or technique used to relieve pressure upon an organ (as in fractures of the skull or spine) or within a hollow organ (as in intestinal obstruction)