Thy·​la·​co·​leo | \ ˌthīləˈkōlēˌō\

Definition of Thylacoleo

: a genus (coextensive with the family Thylacoleontidae) of Pleistocene Australian marsupial mammals having a skull about the size of that of a lion, large tusks, and crushing molars

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History and Etymology for Thylacoleo

New Latin, from Greek thylakos sack + Latin leo lion

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