(often, attributive) Any object with some other resemblance to either one or both halves of the shell of a clam.
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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.
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The shell of a clam.
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Add your own interpretation of "clamshell".
Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.