LABYRINTHODONT

[lab.y.rin.tho.dont] n [NL Labyrinthodontia, fr. Gk labyrinthos + odont-, odous tooth--more at tooth] (ca. 1852): any of a superorder (Labyrinthodontia) of extinct amphibians of the Late Paleozoic and Early Mesozoic typically having bodies resembling salamanders or crocodiles and considered to be the earliest tetrapod vertebrates -- labyrinthodont adj