Rhyolite

2 definitions found

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

  Rhyolite \Rhy"o*lite\, n. [Gr. "rei^n to flow + -lite.] (Min.)
     A quartzose trachyte, an igneous rock often showing a fluidal
     structure. -- {Rhy`o*lit"ic},, a.
     [1913 Webster]

From WordNet (r) 2.0 [wn]:



  rhyolite
       n : very acid volcanic rock