- Also called: swim bladder an air-filled sac, lying above the alimentary canal in bony fishes, that regulates buoyancy at different depths by a variation in the pressure of the air
- any air-filled sac, such as one of the bladders of seaweeds
| 单词 | air bladder |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 air′ blad′der,
Collins Concise English Dictionary © HarperCollins Publishers:: air bladder n
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