ER
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| ER | Eastern Range | - | Atmospheric Research Center |
| ER | Endoplasmic Reticulum | - | Computer Acronyms(common) |
| ER | Emergency Room | - | Medical(slang) |
| ER | Explanation Report | - | Organizations |
| ER | Emergency Room -Eritrea (ISO 3166 Digram; FIPS 10-4 Country Code) | - | Astronomy |
| ER | Erbium | - | Astronomy |
| ER | Electrical Resistivity | - | Business and Finance |
| ER | extended reach | - | Human Genome |