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Definition of: dipnoan
(dip′nō·ən) noun
Any of a group (Dipnoi) of fishes with regular gills, a single or double lung, and nostrils inside as well as outside the mouth; a lungfish.
—adjective Of or pertaining to the Dipnoi. [<NL <Gk. dipnoos <dis- two + pnoē breath]
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