DuckCorp Dico

Found 2 definitions

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Ir \Ir\ n. (Chem.)
      The chemical symbol for iridium, a metallic element of the
      platinum group. It has atomic number 77 and an atomic weight
      of 192.22.
      Syn: iridium.
           [WordNet 1.5]
   
                   
                 

2.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Ir- \Ir-\
      A form of the prefix in-. See In-.
      [1913 Webster]