Meaning
A large, hard biscuit made from unleavened flour and water; formerly used as a long-term staple food aboard ships.
Etymology
Origin: Unknown
From hard + tack.
Synonyms & Antonyms
Synonyms
pilot biscuitpilot breadsea biscuitsea breadship's biscuitship biscuitship breadAnzac wafersheet irontooth duller
NYT Puzzle Appearances
Accepted in 1 recorded puzzle, including a pangram: