reptiles Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. cold-blooded vertebrates with scales or scutes. they lay eggs and include snakes and lizards. Example Sentence Reptiles are cold blooded animals. More Example Sentences Many reptiles bask in the sun. Synonyms cold-blooded animals; lizards; snakes Antonyms warm-blooded animal Hear It! Say It! Write It! reptiles Switch to cursive Start Share with your friends: