Added 10 October 2026 thylacinus noun Categories: AnimalsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about thylacinus at Wordnik → Where our words come from → Tasmanian wolf. Related Words: thylacinecrotaluscalathuslasiuruscrocodylussalvelinusthamnophiscysticercuscarcharhinuscoelophysis Back to today's word