| MC | 1) Musculo-Cutaneous 2) Mixed Cellularity |
|---|---|
| MCTD | Mixed Connective Tissue Disease |
| MEOS | Microsomal Ethanol Oxidizing System = MFOS; Mixed Function Oxidase System |
| MLC | 1) Minimal Lethal Concentration 2) Mixed Lymphocyte Culture |
| NMLH | Nodular Mixed Lymphocytic Histocytic |