Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Barnum Brown, mataimakin mai kula da Gidan Tarihi na Tarihi na Tarihi, ya sami kashi na farko na Tyrannosaurus rex a gabashin Wyoming a 1900. Brown ya sami wani ɓangaren kasusuwa a cikin Tsarin Hell Creek a Montana a cikin 1902, wanda ya ƙunshi kusan ƙasusuwa 34 da aka burbushi. Rubuta a lokacin da Brown ya ce "Quarry No. 1 ya ƙunshi ƙashin ƙugu, pubes, humerus, ƙashin ƙugu uku da kasusuwa biyu da ba a tantance su ba na babban Dinosaur mai cin nama wanda Marsh bai bayyana ba.... Ban taɓa ganin irin wannan ba daga zamanin Cretaceous". Henry Fairfield Osborn, shugaban Gidan Tarihi na Tarihi na Amirka, ya kira kashi na biyu Tyrannosaurus rex a 1905. Sunan na asali ya samo asali ne daga kalmomin Helenanci τύραννος (tyrannos, ma'ana "mai zalunci") da σαῦρος (sauros, ma'ana "lizard"). Osborn ya yi amfani da kalmar Latin rex, ma'ana "sarki", don wannan sunan. Saboda haka cikakken binomial ya fassara zuwa "sarkin zalunci sarki" ko "Sarkin Tyrant Lizard", yana jaddada girman dabba da kuma rinjaye akan sauran nau'in lokaci. Osborn ya kira wani samfurin Dynamosaurus imperiosus a cikin takarda a 1905. A shekara ta 1906, Osborn ya gane cewa kasusuwan biyu sun kasance daga nau'in nau'in kuma sun zabi Tyrannosaurus a matsayin sunan da aka fi so.  Tambaya: Mecece ma'anar kalmar rex?
sarki