oysters Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. marine mollusks having a rough irregular shell; found on the sea bed mostly in coastal waters Example Sentence The pearls in her necklace were found in oysters. Synonyms marine mollusks; bivalve; mollusk Antonyms raccoon Hear It! Say It! Write It! oysters Switch to cursive Start Share with your friends: