Found 2 items, similar to zwieback.
English → English (WordNet) Definition: zwieback zwieback n : slice of sweet raised bread baked again until it is brown and hard and crisp [syn: rusk, Brussels biscuit, twice-baked bread ]
English → English (gcide) Definition: Zwieback Zwieback \Zwie"back`\ (tsv[=e]"b[aum]k`), n. [G., fr. zwie- two, twice (see Twice) + backen to bake.] A kind of biscuit or rusk first baked in a loaf and afterwards cut and toasted. [Webster 1913 Suppl.]