air sac

3 ENTRIES FOUND:

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

First Known Use of AIR SAC

circa 1805

air sac

noun    (Medical Dictionary)

Medical Definition of AIR SAC

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