Prehnite

1 definition found

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

  Prehnite \Prehn"ite\, n. [So called from the German Colonel
     Prehn, who first found it.] (Min.)
     A pale green mineral occurring in crystalline aggregates
     having a botryoidal or mammillary structure, and rarely in
     distinct crystals. It is a hydrous silicate of alumina and
     lime.


     [1913 Webster]