M health terms
- Macroglia
- Maleuss
- Malignant otitis
- Mallory-Weiss syndrome
- Mallory body
- Mallory stain
- Maracyn's sign
- Marasmus
- Marfan syndrome
- Margination
- Marinesco's hand
- Marquis reagent
- McBurney point
- Meckel's diverticulum
- Meconium
- Meconium ileus
- Megaloblast
- Megaloblastic anemia
- Meiosis
- Membrane attack complex
- Memory
- Mendelson syndrome
- Menorrhagia
- Mesenteric ischemia
- Metachromasia
- Metaphase
- Metaplasia
- Microglia
- Microscopic blisters
- Mitomycin
- Mitral valve prolapse
- Mixed leukocyte reaction
- Mongolian spot
- Monosomy
- Mucormycosis
- Mueller-Hinton agar
- Multi-infarct dementia
- Mumps
- Muramidase
- Murmur
- MuSK
- Myasthenia gravis
- Mycolic acid
- Mycosis fungoides
- Mydriasis
- Myelin sheath
- Myenteric plexus
- Myotonic dystrophy
