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Medical Dictionary


noun \ˈgas\
plural gas·es also gas·ses

Medical Definition of GAS

:  a fluid (as air) that has neither independent shape nor volume but tends to expand indefinitely
:  a gaseous product of digestion; also :  discomfort from this
:  a gas or gaseous mixture used to produce anesthesia
:  a substance that can be used to produce a poisonous, asphyxiating, or irritant atmosphere
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