labyrinthodont
noun
lab·y·rin·tho·dont
| \ ˌla-bə-ˈrin(t)-thə-ˌdänt
\
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Definition of labyrinthodont
: any of a superorder (Labyrinthodontia) of extinct amphibians of the Late Paleozoic and Early Mesozoic typically having bodies resembling salamanders or crocodiles and considered to be the earliest tetrapod vertebrates
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