lab·​y·​rin·​tho·​dont ˌla-bə-ˈrin(t)-thə-ˌdänt How to pronounce labyrinthodont (audio)
: 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
labyrinthodont adjective

Word History


New Latin Labyrinthodontia, from Greek labyrinthos + odont-, odous tooth — more at tooth

First Known Use

circa 1841, in the meaning defined above

Time Traveler
The first known use of labyrinthodont was circa 1841

Dictionary Entries Near labyrinthodont

Cite this Entry

“Labyrinthodont.” Dictionary, Merriam-Webster, Accessed 24 Sep. 2023.

More from Merriam-Webster on labyrinthodont

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!