Meaning Of The Word Air sac

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Air sac Meaning

Air sac Definition
Air sac Definition

What's The Definition Of Air sac?

air sac in British English
any of the air-filled cavities in a bird's body, having connections to the lungs
noun: a sac containing air
noun: any of the membranous air-filled extensions of the lungs of birds, which increase the efficiency of gaseous exchange in the lungs

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