plural of acorn-shell

plural of tooth shell

plural of worm-shell

(zoology) Any member of the sea snail genus Vermetus.

(physics) The collective states of all electrons in an atom having the same principal quantum number (visualized as an orbit in which the electrons move).

Any of several large, thick, spiral marine shells belonging to Rapa and allied genera, somewhat turnip-shaped.

plural of turnip shell

plural of turban shell

A marine gastropod of the family Turbinidae, or the shell thereof.

plural of bubble shell