

| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| ADA | Adenosine Deaminase | In English | → Genetics → Enzymes | 
| ADA | Adaptive Diagnostic Authoring | In English | |
| ADA | Azimuth Drive Assembly | In English | |
| ADA | Austrian Development Agency (www.ada.gv.at) | In English | → Central administration → Development → Austria | 
| ADA | American Diabetes Association (www.diabetes.org) | In English | → Associations → Physiology → Pathology → United States | 
| ADA | American Dietetic Association | In English | → Associations → Nutrition → United States | 
| ADA | American Dental Association (www.ada.org) | In English | → Associations → Dentistry → United States | 
| ADA | Armenian Development Agency | In English | → 33972 → International economic cooperation | 
| ADA | American Disabilities Act | In English | → Politics → United States |