Webster's English Dictionary

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chlorine

Cross references:
  1. element               
 
chlo.rine \'klo-(*)r-.e-n, 'klo.(*)r-, -*n\ n : a halogen element isolated 
   as a heavy greenish yellow irritating gas of  pungent odor used esp. as a 
   bleach, oxidizing agent, and disinfectant in water purification