Rare term for Tyrannosaurus rex; more commonly referred to as ティラノサウルス・レックス or ティラノサウルス.
Tyrannosaurus rex was a large carnivorous dinosaur that lived at the end of the Cretaceous period.
Composed of 覇王 (supreme ruler) and 竜 (dragon/dinosaur), likely a calque or translation of 'tyrant lizard king'.