clamshell

The shell of a clam.

Any object that, in (literal or figurative) resemblance to the shell of a clam, has a hinge on one edge and two surfaces that close together.

A dredging bucket with hinges like the shell of a clam.

In food service, the closing box (usually styrofoam but sometimes cardboard) given to consumers with take-out food.

often attributiveAny object with some other resemblance to either one or both halves of the shell of a clam.

musicAn amphitheater, especially an outdoor amphitheater; the semi-circular acoustic backdrop behind and above the performers.

manufacturingTo deform a die in a shape resembling the shell of a clam, as a result of uneven extrusion pressure.

To dig out by means of a clamshell (dredging bucket).

To compress or flatten underwater debris so as to avoid blocking a channel.

To open or close by means of a hinge, similar to the way a clamshell opens and closes.