iridium

/ɪˈrɪdiəm/

Definitions of iridium

1. noun

   a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
   synonyms: Ir, atomic number 77

   type of:

   metal, metallic element

   any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.