greisen

2 definitions found

greisen - Collaborative International Dictionary of English v.0.48 :

  Greisen \Grei"sen\, n. (Min.)
     A crystalline rock consisting of quarts and mica, common in
     the tin regions of Cornwall and Saxony.
     [1913 Webster]

greisen - WordNet (r) 2.1 (2005) :

  greisen
      n 1: a granitic rock composed of quartz and mica