What is the meaning of Conch?

A marine gastropod of the family Strombidae which lives in its own spiral shell.

The shell of this sea animal.

A musical instrument made from a large spiral seashell, somewhat like a trumpet.

The semidome of an apse, or the apse itself.

Synonym of concher (“machine used to refine the flavour and texture of chocolate”).

To refine the flavour and texture of chocolate by warming and grinding, either in a traditional concher, or between rollers.

To play a conch seashell as a musical instrument, by blowing through a hole made close to the origin of the spiral.

Source: wiktionary.org