labyrinthodont

lab·y·rin·tho·dont  (lb-rnth-dnt)

n.

1. Having teeth with a labyrinthine internal structure.

2. Of or relating to the superorder Labyrinthodontia, an extinct group of amphibians resembling crocodiles and having a labyrinthine tooth structure.

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labyrinthodont  (lb-rnth-dnt)

Any of various extinct amphibians of the group Labyrinthodontia, which were the dominant animals of the late Paleozoic Era. Labyrinthodonts had stocky, lizardlike bodies with short limbs, and fishlike teeth with labyrinthine structure (with complex infolding of the enamel). They varied from the size of a salamander to that of a crocodile. One early genus, Ichthyostega, was probably the first terrestrial vertebrate.

Thesaurus

Noun

1.

labyrinthodont - an amphibian of the superorder Labyrinthodontia amphibian - cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form Labyrinthodonta, Labyrinthodontia, superorder Labyrinthodonta, superorder Labyrinthodontia - extinct amphibians typically resembling heavy-bodied salamanders or crocodiles and having a solid flattened skull and conical teeth; Devonian through Triassic