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3rd Decl Masc rex

Every sixth grader knows this word as part of the name of the fiercest dinosaur, Tyrannosaurus Rex. For whatever reason, the first part of his name is actually Greek: Tyrant Lizard, and his last name Rex is Latin for king. So his name is really Tyrant Lizard King. I guess the person who created the name was a true Classicist. :)
Latin Typing Key

a_ e_ i_ o_ u_
ā  ē  ī  ō  ū
Masculine
  • Singular
  • Dual
  • Plural