1. the shell of a clam, consisting of two hinged parts
2. a container or device that opens and closes like a clamshell

1. designed to open and close on a hinge like a clamshell

Examples

• She found a beautiful clamshell on the beach.
• The children collected clamshells to make crafts.
• He opened the clamshell packaging carefully.
• The laptop has a clamshell design that folds shut.
• The clamshell phone was popular in the early 2000s.
• She stored her jewelry in a small clamshell box.
• The clamshell container kept the food fresh.