ship biscuit

Từ điển WordNet v3.1 - WordNet Dictionary

noun

very hard unsalted biscuit or bread;
a former ship's staple
• Syn:
hardtack, pilot biscuit, pilot bread, sea biscuit
• Hypernyms:
biscuit

• Từ đồng nghĩa / Synonyms:
  hardtack, pilot biscuit, pilot bread, sea biscuit