air passage

noun

Medical Definition of air passage 

: a channel or part through which air passes specifically : an anatomical part (such as the pharynx and bronchial tubes) involved in respiration Pertussis is a bacterial infection of the air passages leading to the lungs … —Jane E. Brody, The New York Times, 2 Mar. 2004 While asthma was once defined purely as intermittent, reversible spasms of the air passages in the lungs, its underlying cause is now known to be chronic inflammation of those airways … —Judy Packer-Tursman, The Washington Post, 31 Oct. 2000

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