air bladder

Noun

Meaning

An air sac, sometimes double or variously lobed, in the visceral cavity of many fishes. It originates in the same way as the lungs of air-breathing vertebrates, and in the adult may retain a tubular connection with the pharynx or esophagus.

A sac or bladder full of air in an animal or plant; also an air hole in a casting.

Source: Webster's dictionary

Synonyms

float swim bladder air sac air cell air space air bubble air bag air chamber air lock air pocket air hose inner tube gas bladder plenum chamber air reservoir
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Hypernyms

sac

Close letter words and terms

air bed air bed as set air biscuit air bladders air blanket air blaster