hardtack

Plural: hardtacks

Noun

• A hard, unsweetened biscuit, often used for sustenance.
• very hard unsalted biscuit or bread; a former ship's staple
• a mountain mahogany
• A large, hard biscuit made from unleavened flour and water; formerly used as a long-term staple food aboard ships.

Examples

• That nine-letter word was as unappealing as hardtack, but it scored big.

Synonyms

pilot biscuit, pilot bread, sea biscuit, ship biscuit, ;, Anzac wafer, sea bread, sheet iron, ship bread, ship's biscuit, tooth duller, worm castle