DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   atomic number 53
       n 1: a nonmetallic element belonging to the halogens; used
            especially in medicine and photography and in dyes; occurs
            naturally only in combination in small quantities (as in
            sea water or rocks) [syn: iodine, iodin, I, atomic
    number 53]