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18.188.168.28
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1 definition found

From: WordNet (r) 2.0

 atomic number 17
      n : a common nonmetallic element belonging to the halogens; best
          known as a heavy yellow irritating toxic gas; used to
          purify water and as a bleaching agent and disinfectant;
          occurs naturally only as a salt (as in sea water) [syn: chlorine,
           Cl]