oyster
/ˈɔɪstə(r); `ɔɪstɚ/ n
1 shellfish (used as food and usu eaten uncooked) some types of which produce pearls inside their shells 牡蛎, 蚝（常生吃）: fresh oysters 新鲜牡蛎
[attrib 作定语]
oyster stew 炖牡蛎. =>illus at shellfish 见shellfish插图.
2 (idm 习语) the world is one's/sb's oyster => world.