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jackknife clam

noun

razor clam

noun
1.
any bivalve mollusk of the family Solenidae, especially of the genus Ensis, having a long, rectangular, slightly curved shell.
Also called jackknife clam.
Origin
1880-1885
1880-85, Americanism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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