Definitions for: Zwieback

[n] slice of sweet raised bread baked again until it is brown and hard and crisp

Webster (1913) Definition: Zwie"back`, 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.

Synonyms: Brussels biscuit, rusk, twice-baked bread

See Also: toast