Iridium
Origin
From Ancient Greek ἶÏις ("rainbow") (because of the bright colour of many of iridium's salts).
Full definition of iridium
Noun
iridium
(uncountable)- A metallic chemical element (symbol Ir) with an atomic number of 77.
From Ancient Greek ἶÏις ("rainbow") (because of the bright colour of many of iridium's salts).