air bladder
noun
Forms air bladders
- noun An internal organ that fish use to control their buoyancy, allowing them to maintain or change depth by changing their density.
- noun A type of packing material that consists of an airtight bag full of air, used to cushion fragile items.
Synonyms
Webster’s 1913
- 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.
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “air bladder”, CC BY-SA 4.0. Details