The suffix “-rex” derives from the Latin word for “king.” Examples include the biological classification term Tyrannosaurus rex, meaning “tyrant lizard king,” and the term Carnivorex, sometimes used to describe a carnivorous dinosaur exhibit.
This suffix carries a sense of power and dominance, often used in biological nomenclature to denote apex predators or figures of significant size and strength within their ecosystem. Historically, the regal connotation associated with “-rex” has made it a popular choice in fiction and popular culture, lending an air of majesty or menace to characters and creatures.