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Search Result:air sac




Overview of noun air_sac

The noun air sac has 3 senses


  • alveolus, air sac, air cell -- (a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways)

  • air sac -- (any of the thin-walled extensions of the tracheae of insects)

  • air sac -- (any of the membranous air-filled extensions of the lungs of birds)