amphibian

& 8. [Eng., ., amphibia; -an. ] 1. As adjective: Pertaining to any amphibious animal, or specially to the Amphibia (q.v.). 2. As substantive: An animal belonging to the Amphibia (q. v.). the close affinity of the fish and the am phibian."-Huxley: Cla if, of Animals , xxv. "It is founded on some reptiles and amphibians ."Darwin: Descent of Man, vol. i., pt. 1, ch. i.