Labyrinthodont Definition
 lăbə-rĭnthə-dŏnt 
    adjective
  
 Having teeth with a labyrinthine internal structure.
 American Heritage 
Of or relating to an extinct group of amphibians having a labyrinthine tooth structure, often classified in the subclass (or superorder) Labyrinthodontia.
 American Heritage 
    noun
  
 Any extinct amphibian of the subclass Labyrinthodontia.
Wiktionary 
Other Word Forms of Labyrinthodont
Noun
Singular:
 labyrinthodontPlural:
 labyrinthodontsOrigin of Labyrinthodont
- Ancient Greek λαβύρινθος (laburinthos, “labyrinth") + ὀδών (odōn, “tooth"). - From Wiktionary 
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