sea biscuit

ship biscuit; hardtack.

Origin of sea biscuit

First recorded in 1670–80

The repast on the table consisted of a can or large black-jack of small beer, and a japan bread-basket, full of sea-biscuit.

Frank Mildmay |Captain Frederick Marryat
Yes, they are all departed, and there is nothing left us but salt-horse and sea-biscuit.

Typee |Herman Melville
He had a sea-biscuit in his pocket, which he gave her and made his own supper of dried fish.

The Real America in Romance, Volume 6; |John R. Musick
One day when I was spreading a sea-biscuit thick with it for a wide-awake youngster, I heard them whisper, "Chut-chut!"

Sailing Alone Around The World |Joshua Slocum

The food of the sailors who are thus afflicted consists mainly of salted beef and sea-biscuit.

The Action of Medicines in the System |Frederick William Headland

sea biscuit

another term for hardtack