| MDHR | maximum determined heart rate |
|---|---|
| MDPD | maximum daily permissible dose |
| ME | macular edema; malic enzyme; manic episode; maximum effort; median eminence; medical education; medi... |
| MEP | maximum expiratory pressure; mean effective pressure; mepiridine; mitochondrial encephalopathy; moto... |
| METT | maximum exercise tolerance test |