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Noun: jackknife clam  'jak,nIf klam
  1. Marine clam having a long narrow curved thin shell
    "The jackknife clams burrowed quickly into the wet sand as the tide receded";
    - razor clam, knife-handle

Derived forms: jackknife clams

Type of: clam

Part of: Ensis, genus Ensis

Encyclopedia: Jackknife clam