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drusy ‎(not comparable)

  1. (mineralogy) Having a druse.
    • 1856, David Thomas Ansted, Elementary Course of Geology, Mineralogy, and Physical Geography
      A mineral having a drusy cavity is sometimes called a geode.
    • 1963, Proceedings of the Yorkshire Geological Society
      ...before deposition of the upper layer of sediment, and before the infilling of the cavity with a drusy mosaic.