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physostomi
CIDE DICTIONARY
physostomi, n. pl. [NL., fr. Gr. a bellows + mouth.].
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. [1913 Webster]
For further exploring for "physostomi" in Webster Dictionary Online