| MMMF | man-made mineral fibers |
|---|---|
| MO | macroorchidism; manually operated; Master of Obstetrics; Master of Osteopathy; medical officer; mesi... |
| MO-MOM | mineral oil and milk of magnesia |
| MSM | medium-size molecule; mineral salts medium |
| SMB | selected mucosal biopsy; standard mineral base |