hardtack has definitions from the fields of chemistry,nautical,food,botany
1
[ noun ] (chemistry,nautical,food) very hard unsalted biscuit or bread; a former ship's staple

Used in print

(Robert Penn Warren, Wilderness....)

Beyond that misty gray of the rain , he saw the stretching hutment , low diminutive log_cabins , chinked with mud , with doorways a man would have_to crouch to get through , with roofs of tenting laid_over boughs or boards from hardtack boxes , or fence_rails , with cranky chimneys of sticks and dried mud .

He saw Mose squatting by the hearth , breaking_up hardtack into a pan .

He dumped the pan of crumbled hardtack into the boiling pot of lobscouse .

Related terms

biscuit

2
[ noun ] (botany) a mountain mahogany

Used in print

(Robert Penn Warren, Wilderness....)

Pullen_James humbly lowered his head , pushed_aside the hardtack box door of the hut , and was gone from sight .

Related terms

mahogany

*