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单词 porphyroid
释义 porphyroid
 /pawr"feuh royd'/,  n.  
  1. a rock resembling porphyry.
  2. a sedimentary rock that has been metamorphosed so as to leave some original crystals in a fine-textured, layered matrix.
 [1790-1800; PORPHYR(Y) + -OID]
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