hardtack

[ hahrd-tak ]
/ ˈhɑrdˌtæk /

noun

a hard, saltless biscuit, formerly much used aboard ships and for army rations.
Also called pilot biscuit, pilot bread, ship biscuit, ship bread.

Origin of hardtack

First recorded in 1830–40; hard + tack2

British Dictionary definitions for hard tack (1 of 2)

hard tack

noun

Irish informal whisky

British Dictionary definitions for hard tack (2 of 2)

hardtack
/ (ˈhɑːdˌtæk) /

noun

a kind of hard saltless biscuit, formerly eaten esp by sailors as a staple aboard ship Also called: pilot biscuit, ship's biscuit, sea biscuit