rusk

noun

1. slice of sweet raised bread baked again until it is brown and hard and crisp

   noun.food

   Synonyms brussels biscuit twice-baked bread zwieback

   Source: WordNet 3.0

2. A kind of light, soft bread made with yeast and eggs, often toasted or crisped in an oven; or, a kind of sweetened biscuit.

   noun

   Source: webster1913