hardtack

[ hahrd-tak ]
/ ˈhɑrdˌtæk /

noun

a hard, saltless biscuit, formerly much used aboard ships and for army rations.

Origin of hardtack

First recorded in 1830–40; hard + tack2
Also called pilot biscuit, pilot bread, ship biscuit, ship bread.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for hardtack

hardtack

/ (ˈhɑːdˌtæk) /

noun

a kind of hard saltless biscuit, formerly eaten esp by sailors as a staple aboard shipAlso called: pilot biscuit, ship's biscuit, sea biscuit
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012