clamshell

clam +‎ shell

clamshell (plural clamshells)

1. The shell of a clam.
2. A dredging bucket with hinges like the shell of a clam.
3. In foodservice, the white, usually styrofoam box given to consumers with take-out food.
4. Any object that has a hinge on one edge and two surfaces that close together.
   • 1988, PC Mag (volume 7, number 17, 11 October 1988, page 93)

     You'll find a mix among clamshell laptops for strong laps, lunchboxes, and sewing-machine configurations; the latter two designs typically have detachable keyboards.

5. (music) An amphitheater, especially an outdoor amphitheater; the semi-circular acoustic backdrop behind and above the performers.

clamshell (not comparable)

1. similar to the operation of a clam's shell, having a hinge with two sides closing together

   It's a clamshell antenna.

• clamshell phone

• clamshell on Wikipedia.Wikipedia