Sea Biscuit
Explanation:
Sugg.
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Note added at 5 mins (2011-04-18 14:27:10 GMT)
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Also "Hardtack". Please see reference below.
http://en.wikipedia.org/wiki/Sea_biscuit
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Note added at 7 mins (2011-04-18 14:29:36 GMT)
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"Hardtack (or hard tack) is a simple type of cracker or biscuit, made from flour, water, and sometimes salt. Inexpensive and long-lasting, it was and is used for sustenance in the absence of perishable foods, commonly during long sea voyages and military campaigns.
[1] The name derives from the British sailor slang for food, "tack". It is known by other names such as pilot bread (as rations for ship's pilots
[2]), ship's biscuit, shipbiscuit, sea biscuit, sea bread (as rations for sailors) or pejoratively "dog biscuits," "tooth dullers," "sheet iron," "worm castles" or "molar breakers".
[3] Australian military personnel know them as ANZAC wafers."
|   Arthur Godinho
United States
Local time: 07:17
Native speaker of:  Portuguese
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The translation workplace 
peer agreement (net): +6