Dinosaurian is a term used to describe creatures that lived during the Mesozoic Era, also known as the Age of Dinosaurs. Synonyms for dinosaurian include extinct reptiles, prehistoric beasts, ancient saurians, and dinosaur-like creatures. These terms are often used to describe creatures that resemble dinosaurs but are not true dinosaurs, such as pterosaurs, ichthyosaurs, and mosasaurs. Other synonymous terms that are used include prehistoric creatures, Jurassic monsters, and ancient reptiles. These terms are often used in popular culture, such as movies and television shows, to describe creatures from the Mesozoic Era and to add excitement and intrigue to the story.