chitons Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. marine mollusks with a shell made of eight overlapping plates. Example Sentence The chitons crawled along the rocks. More Example Sentences They have a unique shell made of plates. Synonyms mollusks; shellfish; marine animals Antonyms land animals; birds Hear It! Say It! Write It! chitons Switch to cursive Start Share with your friends: