ATOMIC NUMBER 77

 I. (noun) 

Sense 1

Meaning:

A heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium

Synonyms:

atomic number 77; Ir; iridium

Classified under:

Nouns denoting substances

Hypernyms ("atomic number 77" is a kind 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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