jackknife clam

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Noun1.jackknife clam - marine clam having a long narrow curved thin shelljackknife clam - marine clam having a long narrow curved thin shell
clam - burrowing marine mollusk living on sand or mud; the shell closes with viselike firmness
Ensis, genus Ensis - razor clams
References in periodicals archive ?
Annual reprodutive cycle of the jackknife clams, Solen strictus and Solen gordonis.
Annual reproductive cycle of the Jackknife clams, Solen strictus and Solen gordonis.