labyrinthodont

from WordNet (r) 3.0 (2006)

labyrinthodont
    n 1: an amphibian of the superorder Labyrinthodontia

from The Collaborative International Dictionary of English v.0.48

Labyrinthodont \Lab`y*rin"tho*dont\, a. (Paleon.)
   Of or pertaining to the {Labyrinthodonta}. -- n. One of the
   {Labyrinthodonta}.
   [1913 Webster]