Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «M»:
Morning-after pill: A form of contraception used after rather than before sexual intercourse. Morning-after pills interfere with pregnancy by blocking the implantation of the fertilized egg in the uterus (womb). The pills contain the same drugs as regular birth control pills, but in higher doses, an...
Morphea: Skin changes that are localized to one or more patchy areas of skin that become hardened, dry, smooth and slightly pigmented. Morphea is called "localized scleroderma" but it rarely, if ever, evolves into full-fledged scleroderma, an autoimmune disease of the connective tissue....
Morpheus: In Greek and Roman mythology, the son of sleep and the god of dreams who lay on an ebony bed in a dim-lit cave, surrounded by poppies. Morpheus was the son of Hypnos from whence comes hypnosis. To be in the arms of Morpheus is to be asleep. The drug morphine is named after Morpheus.
Morphia: Another name for morphine. Both morphia and morphine come from the name of Morpheus, the ancient god of sleep and dreams....
Morphine: A powerful narcotic agent with strong analgesic (painkilling) action and other significant effects on the central nervous system. It is dangerously addicting. Morphine is a naturally occurring member of a large chemical class of compounds called alkaloids.
Morphine is highly effective in r...
Morphology: 1. Literally, the study of form. The study of structure.
2. The form itself, as of an organ or part of the body....
Morquio syndrome: An inherited error in carbohydrate metabolism that results in mucopolysaccharide accumulation and severe skeletal defects. The defects are present at birth and include severe deformity of the spine and chest, short neck, loose and enlarged joints, and irregular ends of the long bo...
Mortality: A fatal outcome or, in one word, death.
The word "mortality" is derived from "mortal" which came from the Latin "mors" (death). The opposite of mortality is, of course, immortality. Mortality is also quite distinct from morbidity (illness).
A condition such as tuberculosis can cause morbi...
Mortality rate: A death rate. There are a number of different types of mortality rates as, for examples, the following:
The fetal mortality rate: The ratio of fetal deaths to the sum of the births (the live births + the fetal deaths) in that year.
The infant mortality rate: The number of children d...
Mortality rate, fetal
Mortality rate, fetal: The ratio of fetal deaths to the
sum of the births (the live births + the fetal deaths) in that year. In the United States,
the fetal mortality rate plummeted from 19.2 per 1,000 births in 1950 to 9.2 per 1,000
births in 1980. ...
Mortality rate, infant
Mortality rate, infant: The number of children dying
under a year of age divided by the number of live births that year. The infant mortality rate is also called the infant death rate.
The infant mortality rate is an important measure of the well-being of infants, children, and pregnant women becau...
Mortality rate, maternal
Mortality rate, maternal: The number of maternal
related to childbearing divided by the number of live births (or by
the number of live
births + fetal deaths) in that year. The maternal mortality rate in
the United States in
1993 (and 1994) was 0.1 per 1,000 live births, or one mother dyin...
Mortality rate, neonatal
Mortality rate, neonatal: The number of children dying
under 28 days of age divided by the number of live births that year. The neonatal
mortality rate in the United States, which was 8.4 per 1,000 live births in 1980, declined
to 5.8 per 1,000 live births in 1990....
Mortality, infant: The death of an infant before his or her first birthday.
The infant mortality rate is, by definition, the number of children dying under a year of age divided by the number of live births that year. The infant mortality rate is also called the infant death rate.
The infant morta...
Morton disease: See: Morton's neuroma....