Zoology and Anatomy. A specialized air-filled cavity within the body. Cf. air sac n. at air, n.1 compounds 2.
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| 单词 | θ30910 |
| 释义 | the world > animals > animal body > general parts > internal organs and systems > [noun] > lung or gill > air-sac (3) air cell1774 Zoology and Anatomy. A specialized air-filled cavity within the body. Cf. air sac n. at air, n.1 compounds 2. airbag1782 A bag inflated with air, esp. one in a motor vehicle designed to inflate upon impact so as to cushion the vehicle's occupants in a collision, or (U.S.… air sac1835 a specialized air-filled cavity in the body of an animal; esp. an alveolus in the lung; cf. air cell, n. 1a. |
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