| Abbreviation | Definition |
|---|---|
| ESR | erythrocyte (blood) sedimentation rate |
| ESRL | Earth System Research Laboratory |
| ESRL | Embedded Systems Research Laboratory |
| ESRL | Environmental Sciences Research Laboratory |
| ESSL | Earth and Space Science Laboratory |
| ESSL | Earth System Science Laboratory |
| ESSL | European Severe Storms Laboratory |
| ESSL | Experimental Social Science Laboratory |
| ET | elapsed time |
| ET | Experimental Therapeutics |
| ETCL | East Tennessee Calibration Laboratory |
| ETCL | Electronic Textual Cultures Laboratory |
| ETCO2 | End Tidal Carbon Dioxide |
| ETDRS | Early Treatment Diabetic Retinopathy Study |
| ETEC | Enterotoxigenic Escherichia Coli |
| EtG | Ethyl Glucuronide |
| ETL | Engineer Topographic Laboratories |
| ETL | European Turfgrass Laboratories |
| ETML | Engineered Tissue Mechanics Laboratory |
| ETS | Extraction Tracking Standards |