Melasma - A blotchy brown stain on the skin, usually over the cheeks, forehead, or neck; often associated with pregnancy, menopause, or the use of oral contraceptive

Menarche - Time in life when a girl starts having a menstrual period

Meniere's Disease - Disorder of the inner ear in which there is dizziness, ringing in the ears, and loss of hearing

Meninges - Three-layered tissue that covers the brain and spinal cord

Meningitis - Inflammation of the meninges

Meningocele - Bulging of the meninges through a hole in bone

Meningomyelo - Inflammation of the meninges and roots of the spinal Radiculitis nerves

Meniscectomy - Surgery to remove a meniscus

Meniscitis - Inflammation of a meniscus in the knee

Meniscus - One of two crescent-shaped pads inside the knee joint

Menometrorrhagia - Too much bleeding from the uterus during menstruation

and at other times

Menopause - Time in life when a woman stops having a menstrual period

Menses - Discharge of blood and tissue from the uterus that happens

about every 4 weeks in women who are not pregnant

Menstrual -Having to do with menstruation

Menstrual Period - The time of menstruation

Menstruation - Discharge of blood and tissue from the uterus that happens about every 4 weeks in women who are not pregnant

Metabolism - Total of all the important actions in the body that keep it alive

Metacarpal Bones - Bones of the hand between the wrist and fingers

Metastasis - Spread of disease from one place in the body to another place in the body that is not nearby

Metatarsal - Bones Foot bones

Metastasis - Spread of cancer cells from one part of the body to another

Method - How

Metrorrhea - Discharge from the uterus

MI - See myocardial infarction (MI)

Micro- Describes something that is small or delicate

Microephalus - Person with a very small head

Micturate - Urinate

Middle Ear - The space between the eardrum and the inner ear

Migraine - Type of severe headache that occurs periodically and is often associated with nausea, vomiting, and constipation or diarrhea

MI - Myocardial infarction

Minimal - Slight

Minimize - Reduce

Miotic - Substance that makes the pupil of the eye smaller (e.g., narcotic)

Miscarriage - Loss of an unborn baby from the uterus before it is able to survive outside the mother's body

Mitral Commissurotomy - Surgery to repair the mitral valve to enlarge the opening between the two parts of the left side of the heart

Mitral Stenosis - Narrowing of an opening between two parts of the left side of the heart

Mitral Valve - Valve between two chambers on the left side of the heart

Mobility - Ease of movement

Moderate in intensity - Slight

Molecular Pharmacology - The study of the action between drugs and body cells

Monitor - Check on; keep track of; watch carefully -person from drug company that reviews the data on a study

Monoparesis - Weak muscle movement and loss of feeling in one arm or one leg

Monoplegia - Loss of muscle movement and loss of feeling in one arm or one leg

Morbidity - Undesired result or complication

Mortality - Death or death rate

Motility - The ability to move

Mouth - Opening through which food passes into the body to be digested

MRI - See magnetic resonance imaging (MRI)

MS - See multiple sclerosis (MS)

Mucoid - Slimy

Mucopurulent - Slimy and with pus in it

Mucosa - Moist lining of digestive, respiratory, reproductive, and

Mucous - Membrane urinary tracts

Mucus - Slimy Fluid

Multigravida - Woman who has been pregnant two or more times

Multipara - Woman who has given birth two or more times

Multiple Project - Agreement between institutions and OPRR regarding Assurance institutional policies on the use of human subjects in research

Multiple Sclerosis (MS) - Slowly worsening disorder of the central nervous system that causes weakness, in-coordination, numbness, and problems with talking and seeing

Muscle - Type of tissue that causes movement

Muscular Dystrophy - Genetic problem resulting in muscle weakness and atrophy (MD)

Myasthenia - Muscle Weakness

Myasthenia Gravis - Disorder that causes muscles to get tired quickly

Mydriatic - Substance that makes the pupil of the eye bigger

Myelogram - X-ray of the spinal cord using dye that is injected into the spinal area

Myeloma - Cancer of the types of cells normally found in bone marrow

Myelomalacia - Softening of the spinal cord

Myocardial - Pertaining to the heart

Myocardial - Infarction Heart Attack (MI)

Myocardial - Ischemia Not enough blood going to the heart

Myocarditis - Inflammation of the heart muscle