IR Definition
IR
abbreviation
- 1. Inland Revenue.
2. IVR.
- Iran.
Ir
symbol
- 1. chem.
- Iridium.
iridium
noun
- 1. chem.
- , atomic number 77) a silvery metallic element that is resistant to corrosion, and is mainly used in hard alloys with platinum or osmium to make surgical instruments, pen nibs, bearings, electrical contacts and crucibles.
