air sac
noun
Definition of air sac
1 : one of the air-filled spaces in the body of a bird connected with the air passages of the lungs
2 : alveolus 1b
3 : a thin-walled dilation of a trachea occurring in many insects
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Circa 1805
First Known Use of air sac
circa 1805
AIR SAC Defined for Kids
air sac
noun
Definition of air sac for Students
: one of the small pouches in the lungs where oxygen and carbon dioxide are exchanged
Medical Dictionary
Learn More about air sac
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Britannica.com: Encyclopedia article about air sac
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