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.

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.

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

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 hinged case for a video tape, cassette tape, or video game cartridge.

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 person's mouth.

Shut your clamshell!

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

Any object with some other resemblance to either one or both halves of the shell of a clam. An amphitheater, especially an outdoor amphitheater; the semi-circular acoustic backdrop behind and above the performers.

To 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.