atomic number 77

Noun
  1. A heavy brittle metallic element of the platinum group;
    Used in alloys;
    Occurs in natural alloys with platinum or osmium (synset 114666397)
    is a 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.
    same as: ir, iridium

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