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Adjacent Words

air pump
air rage
air raid
air raid reporting control ship
air reconnaissance
air refueling
air refueling control point
air refueling control team
air refueling control time
air refueling initiation point
air request net
air rifle
air right
air route
air route traffic control center
air search radar
air shaft
air show
air sick
air sickness
air smuggling event
air sock
air sovereignty
air sovereignty mission
air space
air space warning area
air speed
air spring
air staging unit
air station

air sac definitions

WordNet (r) 3.0 (2005)

n
1: a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways [syn: alveolus, air sac, air cell]
2: any of the thin-walled extensions of the tracheae of insects
3: any of the membranous air-filled extensions of the lungs of birds

Merriam Webster's

noun Date: circa 1828 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

Webster's 1913 Dictionary

Air sac 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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