turnip shell

== English == === Noun === turnip shell (plural turnip shells) The shell of any several large, thick, spiral sea snails belonging to genus Rapa and pthers, roughly turnip-shaped. Rapana rapiformis (syn. Rapana bulbosa). === References === Rapana rapiformis on Wikipedia.Wikipedia “turnip-shell”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.