Any of various devices designed to assist breathing or to behave like a lung; (in later use especially) a device connected to the pulmonary circulation to carry out oxygen and carbon dioxide exchange.
Origin
Mid 19th century. From artificial + lung.
Definition of artificial lung in US English:
artificial lung
nounˌɑːtɪfɪʃl ˈlʌŋ
Medicine
Any of various devices designed to assist breathing or to behave like a lung; (in later use especially) a device connected to the pulmonary circulation to carry out oxygen and carbon dioxide exchange.