coelophysis Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a small dinosaur that lived in the late triassic period. it had long legs and a slender body. Example Sentence Coelophysis was a smaller meat eating dinosaur. More Example Sentences Scientists study coelophysis fossils in museums. Synonyms dinosaur; theropod Antonyms worm Hear It! Say It! Write It! coelophysis Switch to cursive Start Share with your friends: