- labyrinthodont⇄adj. 1. having teeth with a labyrinthlike internal structure.
2. of or having to do with a family of large, sometimes huge, extinct amphibians, with a labyrinthlike tooth structure. - labyrinthodont⇄labyrinthodont, adjective, noun.
- labyrinthodont⇄noun a labyrinthodont amphibian.
Ex. Some primitive fossil labyrinthodonts probably were ancestral to the oldest reptiles and so to all higher land vertebrates (Tracy I. Storer).