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air bladder
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- Air bladder - - 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 - - A sac or bladder full of air in an animal or plant; also an air hole in a casting.
- Physoclisti - n. pl. - An order of teleost in which the air bladder has no opening.
- Dipnoi - n. pl. - A group of ganoid fishes, including the living genera Ceratodus and Lepidosiren, which present the closest approximation to the Amphibia. The air bladder acts as a lung, and the nostrils open inside the mouth. See Ceratodus, and Illustration in Appendix.
- Sound - n. - The air bladder of a fish; as, cod sounds are an esteemed article of food.
- Carlock - n. - A sort of Russian isinglass, made from the air bladder of the sturgeon, and used in clarifying wine.
- Physostomi - n. pl. - An order of fishes in which the air bladder is provided with a duct, and the ventral fins, when present, are abdominal. It includes the salmons, herrings, carps, catfishes, and others.