pumpernickel

from WordNet (r) 3.0 (2006)

pumpernickel
    n 1: bread made of coarse rye flour [syn: {black bread},
         {pumpernickel}]

from The Collaborative International Dictionary of English v.0.48

Pumpernickel \Pump"er*nick`el\, n. [G.]
   A sort of bread, made of unbolted rye, which forms the chief
   food of the Westphalian peasants. It is acid but nourishing.
   [1913 Webster]