Definition of swim bladder in English:

swim bladder

Syllabification: swim blad·der

noun

Zoology
  • A gas-filled sac present in the body of many bony fishes, used to maintain and control buoyancy.
    More example sentences
    • An important organ seen in ray-finned fish but not in cartilaginous fish is the swim bladder.
    • A characteristic of the family Gobiidae is the absence of a swim bladder, which is used for buoyancy control.
    • Some fish, for example, have processes from the swim bladder to the inner ear to transmit airborne vibrations.

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