Andesite

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Andesite \An"des*ite\, n. (Min.)
     An eruptive rock allied to trachyte, consisting essentially
     of a triclinic feldspar, with pyroxene, hornblende, or
     hypersthene.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  andesite
       n : a dark gray volcanic rock