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Meaning of AIR SAC

Pronunciation:  ehr sak

 
WordNet Dictionary
 
 Definition: 
  1. [n]  any of the membranous air-filled extensions of the lungs of birds
  2. [n]  any of the thin-walled extensions of the tracheae of insects
  3. [n]  a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
 
 Synonyms: air cell, alveolus
 
 See Also: bird, insect, lung, sac, sac

 

 

Webster's 1913 Dictionary
 
 Definition: 
\Air" sac`\ (Anat.)
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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