A fisherman with bad bones might have oysteoporosis. That’s an awful joke, but the truth is that oyster comes from the Latin and Greek words for bone, ostrea and ostreon respectively. It gets its name because of its hard shell.
William Shakespeare gives us the idiom “The world is my oyster”. In his play, The Merry Wives of Windsor, is the line “Why then the world’s mine oyster/Which I with sword will open.”