air bladder
noun
a vesicle or sac containing air.
Also called gas bladder, swim bladder. Ichthyology.
a gas-filled sac located against the roof of the body cavity of most bony fishes, originally functioning only as a lung, now serving in many higher fishes to regulate hydrostatic pressure.
Origin of air bladder
First recorded in 1725–35
Words nearby air bladder
air ball,
air base,
air battery,
air bed,
air bell,
air bladder,
air blast,
air brake,
air brick,
air bridge,
air cargo
Example sentences from the Web for air bladder
British Dictionary definitions for air bladder
air bladder
noun
Also called: swim bladder ichthyol
an air-filled sac, lying above the alimentary canal in bony fishes, that regulates buoyancy at different depths by a variation in the pressure of the air
any air-filled sac, such as one of the bladders of seaweeds
Scientific definitions for air bladder
air bladder
An air-filled sac in many fish that helps maintain buoyancy or, in some species, helps in respiration, sound production, or hearing. Also called swim bladder
See float.