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Thesaurus: air sac

One of the spaces in different parts of the bodies of birds, which are filled with air and connected with the air passages of the lungs; an air cell.

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Definitions

  1. One of the spaces in different parts of the bodies of birds, which are filled with air and connected with the air passages of the lungs; an air cell.
  2. n. a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
  3. n. any of the thin-walled extensions of the tracheae of insects
  4. n. any of the membranous air-filled extensions of the lungs of birds
  5. One of the spaces in different parts. of the bodies of birds, which are filled with air and connected with the air passages of the lungs; an air cell.
  6. One of the spaces in different parts. of the bodies of birds,which are filled with air and connected with the air passages of thelungs; an air cell.