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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 blue·stone /-ˌston/
 硫酸銅,青石

From: Webster's Revised Unabridged Dictionary (1913)

 Blue·stone n.
 1. Blue vitriol.
 2. A grayish blue building stone, as that commonly used in the eastern United States.
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From: WordNet (r) 2.0

 bluestone
      n : bluish-gray sandstone used for paving and building