air-sags defined in 1951 yearair-sags - air-sags;
air-sags - Of birds: thin-walled, air-filled extensions of the lungs, lying in abdomen and thorax, and extending even into some of the bones. Of some insects: thin-walled diverticula of tracheae. In both, important in respiration.
near air-sags in Knolik
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