Any of various devices with two hinged jaws, used for dredging or digging.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "clamshell" in a sentence
"Courtney's in the back seat with what they call a clamshell, which is a monitor so she can see what the camera's seeing."
"Flash memory cards are nearly all packaged in clamshell type packaging - just go to your local big box retailer to see for yourself."
"The irony is, of course, that they come in clamshell packaging."