Meaning of AIR SAC
| Pronunciation: | | ehr sak
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 WordNet Dictionary |
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- [n] any of the membranous air-filled extensions of the lungs of birds
- [n] any of the thin-walled extensions of the tracheae of insects
- [n] a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
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| | Synonyms: | | air cell, alveolus |
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| | See Also: | | bird, insect, lung, sac, sac | |
| Webster's 1913 Dictionary |
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| | 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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