| MAD | Major Antigenic Determinant |
|---|---|
| MAD | major affective disorder; mandibulo-acral dysplasia; maximum allowable dose; methylandrostenediol; mind-altering drug; minimum average dose; myoadenylate deaminase |
| mAD, MADA | muscle adenylate deaminase; myoadenylate deaminase |
| MADD | Mothers Against Drunk Driving; multiple acyl-CoA dehydrogenase deficiency |
| MADGE | microliter array diagonal gel electrophoresis |
| MADPA | Medicaid Antidiscriminatory Drug Pricing and Patient Benefit Restoration Act |
| MADRS | Montgomery Asberg Depression Rating Scale |
| MADU | methylaminodeoxyuridine |