conchs

noun

1. 1.A marine gastropod of the family Strombidae which lives in its own spiral shell.
2. 2.The shell of this sea animal.
3. 3.A musical instrument made from a large spiral seashell, somewhat like a trumpet.
4. 4.The semidome of an apse, or the apse itself.
5. 5.A machine (rather like a rotating pestle and mortar) used to refine the flavour and texture of chocolate by warming and grinding.