SWIM BLADDER

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

An air-filled sac near the spinal column in many fishes that helps maintain buoyancy

Synonyms:

air bladder; float; swim bladder

Classified under:

Nouns denoting animals

Hypernyms ("swim bladder" is a kind of...):

sac (a structure resembling a bag in an animal)

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