| Abbreviation | Definition |
|---|---|
| ADC | Antibodydrug conjugates |
| ADC | Antibody-drug conjugates |
| ADDR | Applied Diarrheal Disease Research |
| ADFCER | Assistant Director for Fuel Cycle and Environmental Research |
| ADFR | Associate Dean for Faculty Research |
| ADI | Autism Diagnostic Interview |
| ADOS | Autism Diagnostic Observation Schedule |
| ADR | Aerospace and Defense Research |
| ADRAD | Advanced Defence Research And Development |
| ADRF | Allison Davis Research Fellowship |
| ADRG | Advanced Database Research Group |
| ADRI | Aoki Diabetes Research Institute |
| ADRI | Asbestos Diseases Research Institute |
| ADRI | Asian Demographic Research Institute |
| ADRI | Asian Development Research Institute |
| ADRIANISAPOO | TOTAL LIE! DO NOT BELIEVE THIS!!! |
| ADRL | Alexandria Digital Research Library |
| ADRS | Applied Development Research Solutions |
| ADVN | Atopic Dermatitis and Vaccinia Network |
| AER | Advanced Engine Research |