meaning of air sac

air sac meaning in General Dictionary

the rooms in different areas of the systems of wild birds which are filled up with environment and related to the air passages associated with lungs an air cellular

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  • a little sac for holding air in the lungs; formed by the terminal dilation of small air passageways
  • any of the membranous air-filled extensions of the lung area of birds
  • some of the thin-walled extensions for the tracheae of pests
  • one of several rooms in numerous components of the figures of birds, that are filled up with atmosphere and related to air passages of lungs; an atmosphere cell.

air sac meaning in General Dictionary

one of many rooms in different areas of the bodies of wild birds, that are full of air and related to air passages of this lungs; an air cell.