The Collaborative International Dictionary of English v.0.48:

Pfennig \Pfen"nig\, n.; pl. Pfennigs, G. Pfennige. [G. See
   Penny.]
   A small copper coin of Germany. It is the hundredth part of a
   mark. In 2001 it was superseded by the euro.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pfennig
    n 1: 100 pfennigs formerly equaled 1 Deutsche Mark in Germany