Definitions for air bladder
Random House Webster's College Dictionary
air′ blad`der(n.)
a vesicle or sac containing air.
an air-filled sac at the top of the body cavity in bony fishes, serving in most to regulate hydrostatic pressure.
Category: Ichthyology
Ref: Also called swim bladder.
Origin of air bladder:
1725–35
Princeton's WordNet
air bladder, swim bladder, float(noun)
an air-filled sac near the spinal column in many fishes that helps maintain buoyancy
Wiktionary
air bladder(Noun)
An internal organ that fish use to control their buoyancy, allowing them to maintain or change depth by changing their density.
Webster Dictionary
Air bladder(u)
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
Air bladder(u)
a sac or bladder full of air in an animal or plant; also an air hole in a casting
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