Ir

Ir

The symbol for the element iridium.

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Ir Chem iridium

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Ir

The symbol for iridium.

Thesaurus

Noun	1.	Ir - a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium atomic number 77, iridium 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.
	2.	IR - a board of the British government that administers and collects major direct taxes Inland Revenue administrative body, administrative unit - a unit with administrative responsibilities Britain, Great Britain, U.K., UK, United Kingdom, United Kingdom of Great Britain and Northern Ireland - a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom