Webster's English Dictionary

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iodine

Cross references:
  1. element               
 
io.dine also io.din \'i--*-.di-n, -*d-*n, -*-.de-n\ n [F iode, fr. Gk 
   ioeide-s violet colored, fr. ion violet] often attrib  : a nonmetallic 
   univalent and multivalent halogen element obtained usu. as  heavy shining 
   blackish gray crystals and used esp. in medicine, photography, and analysis