sb. Zool. [f. next + -AN.] = next.
1872. Humphry, Myology, 3. In Urodelans the movements of the bony pieces are restricted, or nearly so, to one plane.
1879. Nicholson, Palæont. (ed. 2), II. 175. The Palæosiren of Geinitz is from the Lower Permian, and is believed by its discoverer to be a Urodelan.