Dictionary

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

:  alveolus b

Browse

3 ENTRIES FOUND:
Next Word in the Dictionary: air–sac diseasePrevious Word in the Dictionary: air rootAll Words Near: air sac
May 28, 2015
fictioneer Hear it
someone who writes fiction
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears