labyrinthodont

/L AE0 B ER0 IH1 N TH OW0 D AA1 N T/
noun
  1. 1

    Any extinct amphibian of the subclass Labyrinthodontia

adjective
  1. 1

    Having teeth with a labyrinthine (maze-like) internal structure

Source: https://en.wiktionary.org/wiki/labyrinthodont