| 释义 |
air bladder
noun
: a bladder containing gas, especially air: as
a. : a hydrostatic organ present in most fishes that consists of a gas-filled sac lying dorsal to the alimentary canal and sometimes being connected with the organ of hearing and that serves also as an accessory respiratory organ in dipnoans and some ganoids — called also swim bladder; compare lung
b. : float 4h |