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1. WordNet® 3.0 (2006) | ||
Dipnoi n 1: bony fishes of the southern hemisphere that breathe by a modified air bladder as well as gills; sometimes classified as an order of Crossopterygii [syn: Dipnoi, subclass Dipnoi] | ||
2. The Collaborative International Dictionary of English v.0.48 | ||
Dipnoi \Dip"no*i\, n. pl. [NL., fr. Gr. ? ? with two breathing apertures; di- = di`s- twice + ? breath.] (Zool.) 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. [1913 Webster] | ||
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