| Name | Description |
|---|---|
| Madness | Mentally ill condition. |
| Malaise | A feeling of general discomfort or uneasiness. |
| Malaria | Protozoan diseases, caused by the genus Plasmodium and transmitted by the Anopheles mosquito, causing fever, anemia and debility; Ague. |
| Mange | a contagious skin disease of hairy animals. |
| Mania | A mental disorder marked by dangerous excitement or insane or morbid craving. |
| Marasmus | Emaciation or atrophy in the first year of life. |
| Measles | An acute infectious disease, chiefly of children, marked by cold in head and appearance of white tiny spots on the inner side of the cheek and of rash all over the body. |
| Menorrhagia | Abnormally excessive menstruation. |
| Metritis | Inflammation of the uterus. |
| Micturation | Urination. |
