The Collaborative International Dictionary of English v.0.48:

Groschen \Grosch"en\, n. [G.]
   A small silver coin and money of account of Germany, worth
   about two cents. It was discontinued in the new monetary
   system of the empire and not subsequeently used.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

groschen
    n 1: 100 groschen equal 1 schilling in Austria