pneumatocele

noun
pneu·​ma·​to·​cele | \ ˈn(y)ü-mət-ō-ˌsēl How to pronounce pneumatocele (audio) , n(y)u̇-ˈmat-ə- How to pronounce pneumatocele (audio) \

Medical Definition of pneumatocele

: a gas-filled cavity or sac occurring especially in the lung

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