air bladder

[ air-blad-er ]
See synonyms for air bladder on Thesaurus.com
noun
  1. a vesicle or sac containing air.

  2. 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

1
First recorded in 1725–35

Words Nearby air bladder

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use air bladder in a sentence

British Dictionary definitions for air bladder

air bladder

noun
  1. 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

  2. any air-filled sac, such as one of the bladders of seaweeds

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for air bladder

air bladder

  1. 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

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