ATOMIC NUMBER 77

 Dictionary entry overview: What does atomic number 77 mean? 

• ATOMIC NUMBER 77 (noun)
  The noun ATOMIC NUMBER 77 has 1 sense:

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

  Familiarity information: ATOMIC NUMBER 77 used as a noun is very rare.

 Dictionary entry details 

• ATOMIC NUMBER 77 (noun)

Sense 1

Meaning:

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

Classified under:

Nouns denoting substances

Synonyms:

atomic number 77; Ir; iridium

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.)

 Context examples 

An element with atomic symbol Ir, atomic number 77, and atomic weight 192.217.

(Iridium, NCI Thesaurus)