shell in Wingdings is ⬧︎♒︎♏︎●︎●︎

The hard calcareous or chitinous external covering of mollusks,crustaceans, and some other invertebrates. In some mollusks, as thecuttlefishes, it is internal, or concealed by the mantle. Also, thehard covering of some vertebrates, as the armadillo, the tortoise,and the like.(e) (Zoöl.) Hence, by extension, any mollusks having such a covering.