Africa 
China 
Japan 
MENA 
- Micrometastasis
- Micromixing
- Micromonospora
- Micromonospora echinospora
- Micromorts
- Microneedling
- Microneurography
- Micronuclei
- Micronucleus test
- Micronutrient deficiency
- Micronutrients
- Microparticles
- Micropenis
- Microperimetry
- Microphthalmia
- Microphthalmia-associated transcription factor
- Microplates
- Micropsia
- Micropyle
- Microsatellite DNA
- Microsatellite instability
- Microsatellites
- Microscale thermophoresis
- Microscope slide
- Microscopes
- Microscopic anatomy
- Microscopic colitis
- Microscopic polyangiitis
- Microscopic reversibility
- Microscopy
- Microsleep
- Microsomal ethanol oxidizing system
- Microsomal triglyceride transfer protein
- Microsomes
- Microspherophakia
- Microsporidiosis
- Microsporum
- Microsporum audouinii
- Microsporum canis
- Microsporum gypseum
- Microsporum nanum
- Microstomia
- Microstructure
- Microsurgery
- Microtia
- Microtome
- Microtrauma
- Microtriches
- Microtubule organizing centers
- Microtubule-associated proteins
- Microtubules
- Microvascular angina
- Microvascular decompression
- Microvasculature
- Microvasculitis
- Microvesicles
- Microvessels
- Microvilli
- Microvillous inclusion disease
- Microvillus inclusion disease
- Microviridae
- Microwave ablation
- Microwave heating
- Microwave radiometer
- Microwave thermotherapy
- Micturition
- Micturition reflex
- Mid-inguinal point
- Mid-range
- Mid-sternal line
- Midaxillary line
- Midazolam
- Midbody
- Midbrain reticular formation
- Midcarpal joint
- Middle East Respiratory Syndrome Coronavirus
- Middle age
- Middle cardiac vein
- Middle cerebellar peduncle
- Middle cerebral artery
- Middle cerebral artery syndrome
- Middle cerebral vein
- Middle cervical ganglion
- Middle colic artery
- Middle cranial fossa
- Middle ear
- Middle ear implant
- Middle frontal gyrus
- Middle lamella
- Middle meatus
- Middle meningeal artery
- Middle nasal concha
- Middle rectal artery
- Middle temporal artery
- Middle temporal gyrus
- Middle thyroid vein
- Middle thyroid veins
- Midgut
- Midgut volvulus
- Midkine
- Midline nuclear group
- Midline shift
- Midodrine
- Midostaurin
- Midparent
- Midsternal line
- Midwife
- Midwifery
- Midwives
- Mifamurtide
- Mifepristone
- Migalastat
- Miglitol
- Miglustat
- Migraine aura
- Migraine with aura
- Migraine without aura
- Migraines
- Migrating motor complex
- Milacemide
- Milan criteria
- Milatuzumab
- Mild cognitive impairment
- Milia
- Miliaria
- Miliary tuberculosis
- Milieu therapy
- Military Acute Concussion Evaluation
- Milium
- Milk
- Milk allergy
- Milk fat globule membrane
- Milk line
- Milk production
- Milk protein concentrate
- Milk proteins
- Milk replacer
- Milk-alkali syndrome
- Milky spots
- Millennium Cohort Study
- Miller syndrome
- Miller-Abbott tube
- Million Women Study
- Milnacipran
- Milrinone
- Milroy's disease
- Milt
- Miltefosine
- Milwaukee brace
- Mimicry