DIPNOI

‖Dip″no‐i (?), n. pl. [[NL., fr. Gr. � � with two breathing apertures; δι- = δίσ- twice + � breath.]] (Zoöl.) 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.