sea biscuit sea bird • sea bladder · · · Info · Definitions · Synonyms · Characters · · sea biscuit · · Text Common · · Latin · · Scripts 11 · · Length Definitions · · · (noun) very hard unsalted biscuit or bread; a former ship's staple. Synonyms: hardtack, pilot biscuit, pilot bread, ship biscuit. · · Noun Definition 1 Synonyms · · · ocean · · Synonym 1 sea · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075