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Medical Dictionary


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metoxeny (me-tok′se-ne)
1. SYN: heterecism. 2. Change of host by a parasite. [G. meta, beyond, + xenos, host]

metr-, metra-, metro-
The uterus. SEE ALSO: hystero- (1) , utero-. [G. metra]

metra (me′tra)
SYN: uterus. [G. uterus]

metratonia (me-tra-to′ne-a)
SYN: postpartum atony. [metra- + G. a- priv. + tonos, tension]

metria (me′tre-a)
Pelvic cellulitis or other inflammatory affection in the puerperal period. [G. metra, uterus]

metric (met′rik)
Quantitative; relating to measurement. See m. system. [G. metrikos, fr. metron, measure]

metrifonate (me-tri′fo-nat)
SYN: trichlorfon.

metriocephalic (met′re-o-se-fal′ik)
Having a head well proportioned to height; denoting a skull with an index between 72 and 77. SEE ALSO: orthocephalic. [G. metrios, moderate, fr. metron, measure, + kephale, head]

metritis (me-tri′tis)
Inflammation of the uterus. [G. metra, uterus, + -itis, inflammation]

metrizamide (me-triz′a-mid)
SYN: metrizoate sodium.

metrizoate sodium (met-ri-zo′at)
A diagnostic radiopaque medium. SYN: metrizamide.

metro-
See metr-. [G. metra, uterus]

metrocyte (me′tro-sit)
SYN: mother cell. [G. meter, mother, + kytos, a hollow (cell)]

metrodynamometer (me-tro-di′na-mom′e-ter)
Instrument for measuring the force of uterine contractions. [metro- + G. dynamis, power, + metron, measure]

metrodynia (me-tro-di′ne-a)
SYN: hysteralgia. [metro- + G. odyne, pain]

metrolymphangitis (me′tro-lim-fan-ji′tis)
Inflammation of the uterine lymphatics. [metro- + lymphangitis]

metronidazole (met-ro-ni′da-zol)
An orally effective trichomonicide used in the treatment of infections caused by Trichomonas vaginalis and Entamoeba histolytica and Gram-negative anaerobic bacteria. Can produce a disulfiram reaction when combined with alcohol.

metronoscope (me-tron′o-skop)
A tachistoscopic apparatus that exposes for timed intervals short selections of printed matter for reading; used in testing and developing reading speed. [G. metron, measure, + skopeo, to view]

metropathia (me-tro-path′e-a)
SYN: metropathy. [L.] m. hemorrhagica abnormal, excessive, often continuous uterine bleeding due to persistence and exaggeration of the follicular phase of the menstrual cycle; the endometrium is the seat of glandular hyperplasia with cyst formation. See Swiss cheese endometrium.

metropathic (me-tro-path′ik)
Relating to or caused by uterine disease.

metropathy (me-trop′a-the)
Any disease of the uterus, especially of the myometrium. SYN: metropathia. [metro- + G. pathos, suffering]

metroperitonitis (me′tro-per-i-to-ni′tis)
SYN: perimetritis. [metro- + peritonitis]

metrophlebitis (me′tro-fle-bi′tis)
Inflammation of the uterine veins usually following childbirth. [metro- + G. phleps, vein, + -itis, inflammation]

metroplasty (met′tro-plas-te, me′tro-)
SYN: uteroplasty.

metrorrhagia (me-tro-ra′je-a)
Any irregular, acyclic bleeding from the uterus between periods. [metro- + G. rhegnymi, to burst forth]

metrorrhea (me′tro-re′a)
Discharge of mucus or pus from the uterus. [metro- + G. rhoia, a flow]

metrosalpingitis (me′tro-sal-pin-ji′tis)
Inflammation of the uterus and of one or both fallopian tubes. [metro- + G. salpinx, trumpet (oviduct), + -itis, inflammation]

metrostaxis (me-tro-stak′sis)
Small but continuous hemorrhage of the uterine mucous membrane. [metro- + G. staxis, a dripping]

metrostenosis (me′tro-ste-no′sis)
A narrowing of the uterine cavity. [metro- + G. stenosis, a narrowing]

metrotomy (me-trot′o-me)
SYN: hysterotomy. [metro- + G. tome, incision]

metyrapone (me-tir′a-pon)
An inhibitor of adrenocortical steroid C-11 β-hydroxylation, administered orally or intravenously to determine the ability of the pituitary gland to increase its secretion of corticotropin; because 11-deoxycorticosteroids, as a consequence of m. administration, only weakly inhibit pituitary corticotropin secretion, the normal pituitary gland will appreciably increase its output of this hormone. SYN: mepyrapone.

metyrosine (me-ti′ro-sin, -sen)
An inhibitor of tyrosine hydroxylase and therefore a powerful inhibitor of catecholamine synthesis; used for controlling the manifestations of pheochromocytoma, in preoperative preparation, or in instances where surgical resection is contraindicated or incomplete.

Mev
Symbol for 1 million electron-volts.

mevalonate (mev-a-lon′at)
The salt or ester of mevalonic acid. m. kinase an enzyme that catalyzes the reaction of m. and ATP to form ADP and m. 5-phosphate; this enzyme participates in the pathway for steroid synthesis; a deficiency of this enzyme will lead to mevalonic aciduria and lack of development.

mevalonic acid (mev-a-lon′ik)
Precursor of squalene, steroids, terpenes, and dolichol.

mevalonic aciduria
Elevated levels of mevalonic acid in the urine; associated with a deficiency of mevalonate kinase.

mevastatin (mev′a-stat-in)
Fungal metabolite which is a potent inhibitor of HMG-CoA reductase, the rate-controlling enzyme in cholesterol biosynthesis. The drug, similar to lovastatin, pravastatin and simvastatin, is used in the treatment of hyperlipidemia.

mevinolin (me-vin′o-lin)
SYN: lovastatin.

mexenone (mek′se-non)
A sun-screening agent.

mexiletine (meks-il′e-ten)
A cardiac antiarrhythmic drug used to treat ventricular arrhythmias; resembles lidocaine in its actions but is orally effective.

mexiletine hydrochloride (meks-il′e-ten)
An orally active antiarrhythmic agent used to suppress symptomatic ventricular arrhythmias; resembles lidocaine in its actions but is orally effective.

Meyenburg
H. von, Swiss pathologist, *1877. See M. complex, M. disease, M.-Altherr-Uehlinger syndrome.

Meyer
Adolf, U.S. psychiatrist, 1866–1950. See M.-Archambault loop.

Meyer
Edmund V., German laryngologist, 1864–1931. See M. cartilages, under cartilage.

Meyer
Georg H., Swiss anatomist, 1815–1892. See M. line, M. sinus.

Meyer
Hans H., German pharmacologist, 1853–1939. See M.-Overton rule, M.-Overton theory of narcosis.

Meyer
Willy, U.S. surgeon, 1858–1932. See M. reagent.

Meyer-Betz
Friedrich, 20th century German physician. See Meyer-Betz disease, Meyer-Betz syndrome.

Meyerhof
Otto F., German-U.S. biochemist and Nobel laureate, 1884–1951. See Embden-M. pathway, Embden-M.-Parnas pathway, M. oxidation quotient.

Meyer-Schwickerath
Gerhard Rudolph Edmund, German ophthalmologist, *1920.

Meynert
Theodor H., Vienna neurologist, 1833–1892. See retroflex bundle of M., M. cells, under cell, M. commissure, M. decussation, fasciculus of M., M. layer.

mezlocillin sodium (mez-lo-sil′in)
C21H24NaN5O8S2;an extended spectrum penicillin antibiotic used intravenously and intramuscularly.

Mg
Symbol for magnesium.

mg
Symbol for milligram.

MGP
Abbreviation for matrix Gla protein.

MGUS
Abbreviation for monoclonal gammopathy of unknown significance.

MHC
Abbreviation for major histocompatibility complex, minor histocompatibility complex.

mho (mo)
SYN: siemens. [ohm reversed]

MHz
Symbol for megahertz.

MI
Abbreviation for myocardial infarction.

mianserin hydrochloride (me-an′ser-in)
An H1 antihistaminic with antiserotonin activity.

mibefradil (mib-ef′ra-dil)
A tetralol derivative in a new class of calcium antagonists that block at T-type channels; used to treat mild to moderate hypertension and angina pectoris.

Mibelli
Vittorio, Italian dermatologist, 1860–1910. See M. angiokeratomas, under angiokeratoma, M. disease.

MIC
Abbreviation for minimal inhibitory concentration.

micatosis (mi′ka-to-sis)
Pneumoconiosis due to inhalation of mica particles.

micellar (mi-sel′er, mi-)
Having the properties of an assemblage of micelles, i.e., of a gel.

micelle (mi-sel′, mi-sel′)
1. Nägeli term for elongated sub(light)microscopic particles, detected in hydrogels, of supramolecular character and crystalline structure; now defined as one of two classes of colloidal particle: those consisting of many molecules, the other class being single macromolecules light- or submicroscopic in size. A m. is thus a structural unit of the disperse phase in a gel, a unit whose repetition in three dimensions constitutes the micellar structure of the gel; it does not denote the individual particles in free suspension or solution, or the unit structure of a crystal. 2. Any water-soluble aggregate, spontaneously and reversibly, formed from amphiphile molecules. 3. A hypothetical ordered region in a natural fiber such as cellulose. [L. micella, small morsel, dim. of mica, morsel, grain]

Michaelis
Leonor, German-U.S. chemist, 1875–1949. See M.-Gutmann body, M. constant, M.-Menten constant, M.-Menten equation, M.-Menten hypothesis.

Michel
Gaston, French surgeon, 1874–1937. See M. spur.

Michel
M., 19th century French physician. See M. malformation.

Micheli
Ferdinando, Italian physician, 1872–1936. See Marchiafava-M. anemia, Marchiafava-M. syndrome.

miconazole nitrate (mi-kon′a-zol)
An antifungal agent.

micr-
See micro-.

micrencephalia (mi′kren-se-fa′le-a)
SYN: micrencephaly.




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