| Abbreviation | Definition |
|---|---|
| ADD | Adduct |
| ADD | Adduction |
| ADD | Adenosine Deaminase Deficiency |
| ADD | Adult Deficit Disorder |
| ADD | Advanced Dietary Delivery |
| ADD | Alcohol and Drug Dependency |
| ADD | Anatomically Directed Design |
| ADD | Attention Deficit Disorder |
| ADE | Adverse Drug Event |
| ADE | Antibody Dependent Enhancement |
| ADEM | Acute Disseminated EncephaloMyelitis |
| ADENO-CA | Adenocarcinoma |
| ADG | Atrial Diastolic Gallop |
| ADG | Average Daily Gain |
| ADH | Adhesion |
| ADH | AntiDiuretic Hormone |
| ADHD | Attention Deficit Hyperactivity Disorder |
| ADHF | Acute Decompensated Heart Failure |
| ADI | Acceptable Daily Intake |
| ADI | Auditory Development Intervention |