/lung"fish'/ , n. , pl. ( esp. collectively ) lungfish , ( esp. referring to two or more kinds or species ) lungfishes .
any 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).
[ 1880-85; LUNG + FISH ]