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WordReference Random House Unabridged Dictionary of American English © 2024lung•fish (lung′fish′),USA pronunciation n., pl. (esp. collectively) -fish, (esp. referring to two or more kinds or species) -fish•es. - Fishany of various slender, air-breathing fishes of the order (or subclass) Dipnoi, of rivers and lakes in Africa, South America, and Australia, having a lunglike air bladder as well as gills and growing to a length of 3 to 6 ft. (0.9 to 1.8 m).
Collins Concise English Dictionary © HarperCollins Publishers:: lungfish /ˈlʌŋˌfɪʃ/ n ( pl -fish, -fishes)- any freshwater bony fish of the subclass Dipnoi, having an air-breathing lung, fleshy paired fins, and an elongated body. The only living species are those of the genera Lepidosiren of South America, Protopterus of Africa, and Neoceratodus of Australia
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