hardtack

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noun hard·tack \ˈhärd-ˌtak\

Definition of hardtack

plural

hardtack

or

hardtacks

  1. 1 :  a saltless hard biscuit, bread, or cracker

  2. 2 :  any of several mountain mahoganies (especially Cercocarpus betuloides)

1830

First Known Use of hardtack

1830

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a dividing ridge between drainage areas

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