zwie·back /ˈswiˌbæk, ˈswaɪ, ˈzwi, ˈzwaɪ, ˌbɑk/
Zwie·back n. A kind of biscuit or rusk first baked in a loaf and afterwards cut and toasted.
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zwieback
n : slice of sweet raised bread baked again until it is brown
and hard and crisp [syn: rusk, Brussels biscuit, twice-baked
bread]