a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
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a board of the British government that administers and collects major direct taxes
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Ir \Ir\ n. (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.
Syn: iridium. [WordNet 1.5]
A guide for people with savings. Leaflet IR 127.
Ask your tax office for the free pamphlet IR 45 (What happens when someone dies). No legal responsibility can be accepted by the Financial Times for the answers given in these columns.