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greenstone |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: 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 From U.S. Gazetteer (1990) [gazetteer]: Greenstone, PA Zip code(s): 17320