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3 definitions found

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

 arcus
 弓; 弧; 弧狀雲

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 ar·cus /ˈɑrkəs/ 名詞
 弓,弓形帶,帶狀加厚(孢粉)

From: WordNet (r) 2.0

 arcus
      n : an arc-shaped whitish deposit sometimes seen in the cornea
          [syn: arcus senilis]