Greenstone

2 definitions found

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

  Greenstone \Green"stone`\ (gr[=e]n"st[=o]n`), n. [So called from
     a tinge of green in the color.] (Geol.)
     A name formerly applied rather loosely to certain
     dark-colored igneous rocks, including diorite, diabase, etc.
     [1913 Webster]



From U.S. Gazetteer (1990) [gazetteer]:

  Greenstone, PA
    Zip code(s): 17320