American English

Definition of zwieback noun from the Oxford Advanced American Dictionary

 

zwieback

 noun
noun
NAmE//ˈzwaɪbæk//
 
, NAmE//ˈzwibæk//
 
[uncountable] (from German)
 
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slices of sweet bread that are cooked again until they are dry and hard
See the Oxford Advanced Learner's Dictionary entry: zwieback