tə̇|ranə|sȯrəs, (ˌ)tī|r- noun
Etymology: New Latin, from Greek tyrannos tyrant + New Latin -saurus
1. capitalized : a genus of theropod dinosaurs from the Upper Cretaceous of Montana and Wyoming closely related to Ceratosaurus and including a single species ( T. rex ) — see tyrannosaur
2. -es : tyrannosaur