iridium
/ɪˈɹɪd.i.əm/ noun C2- (uncountable) A chemical element with an atomic number of 77: a very hard, brittle, silvery-white transition metal of the platinum group.
- An atom of this element.
Plural iridiums
Learn iridium in real texts
With a free account, hover any word in the library for its meaning, hear it read aloud, save words for review timed to your memory, and see how much of each book you already know.