Origin and Etymology of tyrannosaur
New Latin Tyrannosaurus, from Greek tyrannos tyrant + sauros lizard
First Known Use: 1924
TYRANNOSAUR Defined for Kids
Definition of tyrannosaur for Students
: a very large North American meat-eating dinosaur that had small forelegs and walked on its hind legs
Seen and Heard
What made you want to look up tyrannosaur? Please tell us where you read or heard it (including the quote, if possible).