English noun: hardtack | |||
1. | hardtack (food) very hard unsalted biscuit or bread; a former ship's staple | ||
Synonyms | pilot biscuit, pilot bread, sea biscuit, ship biscuit | ||
Broader (hypernym) | biscuit | ||
2. | hardtack (substance) a mountain mahogany | ||
Broader (hypernym) | mahogany, mahogany tree | ||