alpha-1-antitrypsin

noun
al·​pha-1-an·​ti·​tryp·​sin | \ -ˌwən-ˌant-i-ˈtrip-sən, -ˌan-ˌtī- \

Medical Definition of alpha-1-antitrypsin

: a trypsin-inhibiting serum protein which inhibits the digestive action of elastase on the tissues of the lungs and whose deficiency is associated with the development of emphysema abbreviation AAT

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