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Ir
DEFINITIONS OF:
Ir
1
n
a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
Synonyms:
atomic number 77
,
iridium
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.
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