英语词汇“air sac”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	air sac
释义	WordReference Random House Unabridged Dictionary of American English © 2024 air′ sac′, a sac containing air. Anatomyalveolus (def. 2). any of certain cavities in a bird's body connected with the lungs. a saclike dilation of the wall of a trachea in many insects. 1820–30 Collins Concise English Dictionary © HarperCollins Publishers:: air sac n 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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