Bible Dictionaries
Air Sac

Webster's Dictionary

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.

Bibliography Information
Webster, Noah. Entry for 'Air Sac'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​a/air-sac.html. 1828.