Africa 
China 
Japan 
MENA 
- Monitoring
- Monitoring and evaluation
- Monkeypox
- Monkeypox virus
- MonoMAC
- Monoacylglycerol
- Monoacylglycerol lipase
- Monoamine neurotransmitters
- Monoamine oxidase
- Monoamine oxidase A
- Monoamine oxidase inhibitors
- Monoamine receptors
- Monoamine reuptake inhibitors
- Monoamine transporters
- Monoamines
- Monoarthritis
- Monobenzone
- Monoblasts
- Monobody
- Monocalcium phosphate
- Monocarboxylate transporter 8
- Monocarboxylate transporters
- Monochorionic twins
- Monochromacy
- Monochromator
- Monoclonal B cell lymphocytosis
- Monoclonal antibodies
- Monoclonal antibody
- Monoclonal antibody therapy
- Monoclonal gammopathy
- Monoclonal gammopathy of renal significance
- Monoclonal gammopathy of undetermined significance
- Monoclonality
- Monocrotophos
- Monocryl
- Monocular
- Monocular deprivation
- Monocular vision
- Monocytes
- Monocytic leukemia
- Monocytopenia
- Monocytopoiesis
- Monocytosis
- Monodehydroascorbate reductase
- Monofloral honey
- Monofluoride
- Monogastric
- Monogenic disorder
- Monoglycerides
- Monohydrogen phosphate
- Monokines
- Monolaurin
- Monomania
- Monomelic amyotrophy
- Monomers
- Monomethyl auristatin F
- Monomorphic ventricular tachycardia
- Mononegavirales
- Mononeuropathy
- Mononeuropathy multiplex
- Mononuclear cell infiltration
- Mononuclear cells
- Mononuclear phagocyte system
- Mononuclear phagocytes
- Mononucleosis
- Monooxygenase
- Monopartite
- Monophyly
- Monoplegia
- Monopotassium phosphate
- Monosaccharides
- Monosodium glutamate
- Monosomy
- Monosomy X
- Monoterpenes
- Monoterpenoids
- Monotherapy
- Monounsaturated fat
- Monounsaturated fatty acids
- Monozygotic twins
- Mons pubis
- Montelukast
- Monthly nurse
- Montmorillonite
- Montreal Cognitive Assessment
- Mood
- Mood Disorder Questionnaire
- Mood disorders
- Mood stabilizers
- Mood swings
- Moon face
- Moracizine
- Moral disengagement
- Moral enhancement
- Moral injury
- Moral reasoning
- Morale
- Moraxella
- Moraxella catarrhalis
- Morbid obesity
- Morbilliform
- Morcellation
- Mordants
- Morganella morganii
- Morgellons
- Morin
- Morinda officinalis
- Moringa oleifera
- Morison's pouch
- Morita therapy
- Morning glory syndrome
- Morning sickness
- Morning stiffness
- Morningness-Eveningness Questionnaire
- Moro reflex
- Moronic acid
- Morphiceptin
- Morphinan
- Morphine
- Morphine addiction
- Morphine-6-glucuronide
- Morphogenesis
- Morpholine
- Morpholino
- Morphology
- Morphometrics
- Morphometry
- Morquio syndrome
- Morris water maze test
- Morse Fall Scale
- Mortality
- Mortality rate
- Mortality salience
- Morton's neuroma
- Morton's toe
- Morula
- Morus
- Morus alba
- Morvan's syndrome
- Mosaic virus
- Mosaicism
- Mosapride
- Mosquito bite
- Mosquito bite allergy
- Mosquito control
- Mosquito nets
- Mosquito-borne diseases
- Mossy fibers
- Most probable number
- Most recent common ancestor