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Noun: hardtack  'haa(r)d,tak
  1. Very hard unsalted biscuit or bread; a former ship's staple
    - pilot biscuit, pilot bread, sea biscuit, ship biscuit
  2. A mountain mahogany

Derived forms: hardtacks

Type of: biscuit [N. Amer], mahogany, mahogany tree

Encyclopedia: Hardtack