Tritylodon

noun
Tri·tyl·odon | \ trīˈtiləˌdän \

Definition of Tritylodon 

: a genus of extinct vertebrates from the lower Mesozoic of Africa and Europe in many respects intermediate between reptiles and mammals and formerly classed as primitive mammals but now usually placed among the reptiles forming with a few related forms the family Tritylodontidae

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History and Etymology for Tritylodon

New Latin, from tri- + tyl- + -odon

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