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3 definitions found

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

 sima
 [地]矽鎂帶

From: Webster's Revised Unabridged Dictionary (1913)

 Si·ma n. Arch. A cyma.
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From: WordNet (r) 2.0

 sima
      n : rock that form the continuous lower layer of the earth's
          crust; rich in silicon and magnesium