AU
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| AU | Astronomical Unit | - | Atmospheric Research Center |
| AU | Absorbance Units | - | Computer Acronyms(common) |
| AU | Astronomical Unit | - | Computer Acronyms(common) |
| AU | Both Ears | - | Medical(slang) |
| AU | Astronomical Unit | - | Scuba Diving |
| AU | African Union (was OAU Before 2000) - American University -Astronomical Unit - Australia (ISO 3166 Digram) - Austria (FIPS 10-4 Country Code) | - | Astronomy |
| AU | Gold | - | Astronomy |
| AU | Astronomical Unit | - | Business and Finance |
| AU | authorized users | - | Human Genome |