Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «M»:
Magnesium sulfate: A remarkably versatile compound administered intramuscularly and intravenously as an anticonvulsant and as a tocolytic agent (to halt premature labor), taken by mouth as a fast-acting laxative, and applied locally as an anti-inflammatory. Informally called mag sulfate. Also known ...
Magnet therapy: An alternative therapy in which magnetic fields are administered by application of magnets to certain parts of the body, by magnetic field-generating machines, or by magnetic mattresses or blankets. Magnet therapy has been promoted to diagnose and/or treat arthritis, cancer, circulat...
Magnetic resonance elastography
Magnetic resonance elastography: An imaging technique used to measure the elasticity of tissue by gently shaking the tissue in a magnetic resonance imaging (MRI) machine. The technique employs standard MRI equipment with a few modifications and a vibrating metal plate placed on the skin. Magnetic re...
Magnetic resonance imaging
Magnetic resonance imaging: A special radiology technique designed to image internal structures of the body using magnetism, radio waves, and a computer to produce the images of body structures. In magnetic resonance imaging (MRI), the scanner is a tube surrounded by a giant circular magnet. The pat...
Magnetic resonance perfusion imaging
Magnetic resonance perfusion imaging: A special type of magnetic resonance imaging (MRI) that uses an injected dye in order to see blood flow through tissues....
Magnetic resonance spectroscopic imaging
Magnetic resonance spectroscopic imaging: (MRSI) A noninvasive imaging method that provides information about cellular activity (metabolic information). It is used in oncology along with magnetic resonance imaging (MRI) which provides information about the shape and size of the tumor (spacial inform...
Magnetic-targeted carrier: A tiny bead made from particles of iron and carbon that can be attached to an drug. A magnet applied from outside the body then can direct the drug, for example, to the site of a tumor. This can keep a larger dose of the drug at the tumor site for a longer period of time, ...
Maimonides' Daily Prayer of a
Physician: A prayer that is
said to have been written by the 12th-century physician-philosopher
Moses Maimonides. Like the famous oath of Hippocrates, the prayer of
Maimonides is often recited by new medical graduates.
This prayer, which is also called the "Prayer o...
Mainstream medicine: Medicine as practiced by holders of M.D. or D.O. degrees and by their allied health professionals, such as physical therapists, psychologists, and registered nurses. The term "mainstream medicine" implies that other forms of medicine are outside the mainstream. "Once mainly the ...
Maintenance therapy: Treatment designed to help the original primary treatment succeed. Maintenance chemotherapy may be given to patients with cancer in remission to prevent a relapse....
Major: A major may be an officer in the military but, in a larger sense, it can be anything that is more than something else.
For example, the teres major muscle is larger than the teres minor muscle. In anatomy, wherever there is a major, a minor cannot be far behind....
Major anomaly: An unusual anatomic feature that is of serious medical or cosmetic consequence to the patient. For example, a major anomaly might be a cleft lip and palate.
By contrast, a minor anomaly is an unusual anatomic feature not of serious medical or cosmetic consequence to the patient. Fo...
Major anxiety disorder
Major anxiety disorder: A major disorder characterized by excessive, irrational fear and dread. The major anxiety disorders are:
PTSD (post-traumatic stress disorder);
specific phobias such as claustrophobia; and
generalized anxiety diso...
Major depression: A disease with certain characteristic signs and symptoms that interferes with the ability to work, sleep, eat, and enjoy once pleasurable activities.
The characteristic signs and symptoms of major depression include loss of interest in activities that were once interesting or enjo...
Major gene: A gene that is necessary and sufficient by itself to cause a condition. For example, the APC gene is a major gene for colorectal cancer....