Ir

n.

1.

(Chem.) The chemical symbol for iridium, a metallic element of the platinum group. It has atomic number 77 and an atomic weight of 192.22.

Noun	1.	Ir - 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
	2.	IR - a board of the British government that administers and collects major direct taxes Synonyms: Inland Revenue

1.	(networking)	IR - Internet Registry.
2.	(electronics)	IR - infrared.
3.	(networking)	ir - The country code for Iran.

Internet Registryatomic number 77, iridium, metal, metallic element