From Longman Dictionary of Contemporary Englishoysteroy‧ster /ˈɔɪstə $ -ər/ noun [countable] 1 HBFDFFa type of shellfish that can be eaten cooked or uncooked, and that produces a jewel called a pearl2 → the world is your oyster
Examples from the Corpus
oyster• Long tables with stainless-steel trays held mashed potatoes, sauerkraut, fried oysters and oyster stew.• If we eat out my favourite meal is oysters and caviar followed by asparagus with melted butter.• Simmer oysters in oyster liquor until oyster edges curl.Origin oyster (1300-1400) Old French oistre, from Latin, from Greek ostreon 