IR
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| IR | InfraRed | - | Atmospheric Research Center |
| IR | Isoprene Rubber | - | Computer Acronyms(common) |
| IR | Infrared - Intelligence Requirement (military) -Iran (FIPS 10-4 Country Code; ISO 3166 Digram) - Iran Air (IATA Alpha Code) See Entry For More | - | Astronomy |
| IR | Iridium | - | Astronomy |
| IR | Infrared | - | Business and Finance |
| IR | Infrared | - | Business and Finance |