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mondofacto - Online Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 26/01/2008, UK Words: 116197

MCV
<abbreviation> Mean corpuscular volume. ... (05 Mar 2000) ...

McVay, Chester
<person> U.S. Surgeon, *1911. ... See: McVay's operation. ... (05 Mar 2000) ...

McVay's operation
Repair of inguinal and femoral hernias by suture of the transversus abdominis muscle and its associated fasciae (transversus layer) to the pectineal ligament. ... (05 Mar 2000) ...

MD
Abbreviation of Medicinae Doctor, Doctor of Medicine. ... Symbol for mendelevium. ... (05 Mar 2000) ...

MDMA
A centrally active phenethylamine derivative related to amphetamine and methamphetamine, with central nervous system excitant and hallucinogenic properties. ... Synonym: 3,4-methylenedioxymethamphetamine. ... (05 Mar 2000) ...

MDNCF
Abbrevia tion for monocyte derived neutrophil chemotactic factor. ... (05 Mar 2000) ...

MDS
Abbreviation of Master of Dental Surgery. ... (05 Mar 2000) ...

me
The person speaking, regarded as an object; myself; a pronoun of the first person used as the objective and dative case of the pronoum I; as, he struck me; he gave me the money, or he gave the money to me; he got me a hat, or he got a hat for me. ... In methinks, me is properly in the dative case, and the verb is impersonal, the construction being, …

mead
1. A fermented drink made of water and honey with malt, yeast, etc.; metheglin; hydromel. ... 2. A drink composed of sirup of sarsaparilla or other flavoring extract, and water. It is sometimes charged with carbonic acid gas. ... Origin: OE. Mede, AS. Meodo; akin to D. Mede, G. Met, meth, OHG. Metu, mitu, Icel. Mjor, Dan. Miod, Sw. Mjod, Russ. Med', …

mead-johnson nutritionals
A division of the Mead-Johnson Corporation and maker of Enfamil (R), ProSobee (R), Nutramigen (R), LactoFree (R) and other fine infant nutritional products. ... (27 Sep 1997) ...

meadow dermatitis
A photoallergic reaction to contact with a plant containing furocoumarin in which the bizarre configuration of the eruption is that of the streaky pattern of the plant contact; often occurs after sunbathing. ... Synonym: phytophlyctodermatitis. ... (05 Mar 2000) ...

Meadows, William Robert
<person> U.S. Cardiologist, *1919. ... See: Meadows' syndrome. ... (05 Mar 2000) ...

Meadows' syndrome
<syndrome> Cardiomyopathy developing during pregnancy or the puerperium. ... (05 Mar 2000) ...

meagre
1. Destitue of, or having little, flesh; lean. 'Meager were his looks; Sharp misery had worn him to the bones.' (Shak) ... 2. Destitute of richness, fertility, strength, or the like; defective in quantity, or poor in quality; poor; barren; scanty in ideas; wanting strength of diction or affluence of imagery. 'Meager soil.' 'Of secular habits and mea …

meal
1. Grain (especially. Maize, rye, or oats) that is coarsely ground and unbolted; also, a kind of flour made from beans, pease, etc.; sometimes, any flour, esp. If coarse. ... 2. Any substance that is coarsely pulverized like meal, but not granulated. Meal beetle, the larva of a beetle (Tenebrio molitor) which infests granaries, bakehouses, etc, and …

meal worm
The larva of beetles of the genus Tenebrio; both larvae and adults are important pests, destroying flour, meal, and other cereal products; they are also intermediate hosts of nematodes of the genus Gongylonema, and of various tapeworms of the genus Hymenolepis. ... (05 Mar 2000) ...

mealy
1. Having the qualities of meal; resembling meal; soft, dry, and friable; easily reduced to a condition resembling meal; as, a mealy potato. ... 2. Overspread with something that resembles meal; as, the mealy wings of an insect. ... <zoology> Mealy bug, a scale insect (Coccus adonidum, and related species), covered with a white powderlike subst …

mean
<statistics> Average value calculated by taking the sum of all values and dividing by the total number of values. ... (05 Jan 1998) ...

mean annual increment
The annual average growth rate for a tree, computed over its entire life cycle. ... (05 Dec 1998) ...

mean arterial pressure
<cardiology, physiology> The average value for arterial pressure. Systolic pressure + diastolic pressure divided by 2. ... (27 Sep 1997) ...

mean calorie
One hundredth of the energy required to raise the temperature of 1 g of water from 0°C to 100°C. ... (05 Mar 2000) ...

mean corpuscular haemoglobin
The haemoglobin content of the average red cell, calculated from the haemoglobin therein and the red cell count, in erythrocyte indices. ... (05 Mar 2000) ...

mean corpuscular volume
The average volume of red cells, calculated from the haematocrit and the red cell count, in erythrocyte indices. ... (05 Mar 2000) ...

mean electrical axis
The average magnitude and direction of all the electromotive forces developed during the cardiac event under consideration; e.g., atrial or ventricular depolarisation, or ventricular repolarization. ... See: axis deviation. ... (05 Mar 2000) ...

mean foundation plane
The mean of the various irregularities in form and inclination of the basal seat; the ideal condition for denture stability exists when the mean foundation plane is most nearly at right angles to the direction of force. ... (05 Mar 2000) ...

mean free path
<radiobiology> Average distance a particle travels between occurrences of the given event, for example, between collisions. For collisions, the mean free path is roughly equal to unity divided by the product of the collision cross-section times the particle density. ... (09 Oct 1997) ...

mean high water
<marine biology> The average height of the high water over a 19-year period. For shorter periods of observation, corrections are applied to eliminate known variations and reduce the result to the equivalent of a mean 19-year value. ... All high-waters heights are included in the average where the type of tide is either semidiurnal or mixed. On …

mean higher high water
<marine biology> The average height of the higher high water over a 19-year period. For shorter periods of observation, corrections are applied to eliminate known variations and reduce the result to the equivalent of a mean 19-year value. ... (09 Oct 1997) ...

mean low water
<marine biology> The average height of the low waters over a 19-year period. For shorter periods of observations, corrections are applied to eliminate known variations and reduce the result to the equivalent of a mean 19-year value. ... All low-water heights are included in the average where the type of tide is either semidiurnal or mixed. Onl …

mean lower low water
<marine biology> The average height of the lower low waters over a 19-year period. For shorter periods of observations, corrections are applied to eliminate known variations and reduce the result to the equivalent of a mean 19-year value. ... (09 Oct 1997) ...

mean manifest vector
Synonym for mean vector ... A single cardiac vector representing the average of all vector's present during a given time interval. ... Synonym: mean manifest vector. ... (05 Mar 2000) ...

mean sea level
<marine biology> A tidal datum: the arithmetic mean of hourly water elevations observed over a specific 19-year cycle. Points on land can be referenced to a mean sea level, in which case the datum assumes zero elevation. ... (09 Oct 1997) ...

mean temperature
The average atmospheric temperature in any locality for a designated period of time, as a month or a year. ... (05 Mar 2000) ...

mean vector
A single cardiac vector representing the average of all vector's present during a given time interval. ... Synonym: mean manifest vector. ... (05 Mar 2000) ...

measles
<virology> An acute infectious disease caused by the measles virus, a Morbillivirus in the paramyxovirus family. ... Early symptoms include a low-grade fever, dry cough, pinkeye and cold symptoms. Later symptoms include tiny, white spots lining the inside of the cheeks (Koplik spots) and a red rash which starts on the face and spreads. ... Syno …

measles convalescent serum
Synonym for human measles immune serum ... Obtained from the blood of a healthy person who has survived an attack of measles. ... Synonym: measles convalescent serum. ... (05 Mar 2000) ...

measles immune globulin
A sterile solution of globulin's derived from the blood plasma of normal adult human donors; it is prepared from immune serum globulin that complies with the measles antibody reference standard; a passive immunizing agent. ... Synonym: measles immunoglobulin. ... (05 Mar 2000) ...

measles immunization
The standard MMR vaccine is given to prevent measles, mumps and rubella (german measles). The mmr vaccine is now given in two dosages. The first should be given at12-15 months of age. The second vaccination should be given at 4-6 years (or, alternatively, 11-12 years) of age. most colleges require proof of a second measles or mmr vaccination prior …

measles immunoglobulin
measles immune globulin (human) ...

measles vaccine
A live attenuated virus vaccine of chick embryo origin, used for routine immunization of children and for immunization of adolescents and adults who have not had measles or been immunised with live measles vaccine and have no serum antibodies against measles. Children are usually immunised with measles-mumps-rubella combination vaccine. ... (12 Dec …

measles virus
<virology> Paramyxovirus that causes the childhood disease measles and is responsible for subacute sclerosing panencephalitis. ... (18 Nov 1997) ...

measles virus vaccine
Vaccine containing live, attenuated strains of measles virus prepared in chick embryo cell culture. ... See: measles, mumps, and rubella vaccine. ... (05 Mar 2000) ...

measles, mumps and rubella vaccine
A combination of live attenuated measles, mumps, and rubella viruses in an aqueous suspension; used for immunization against the respective diseases. ... (05 Mar 2000) ...

measly tapeworm
The pork tapeworm, formally known as taenia solium. Contracted from undercooked or measly pork (pork infected with the larval forms of the tapeworm). Can grow to be 3-6 feet (0.9-1.8 m) long in the human intestine. Also known as the armed tapeworm. ... (12 Dec 1998) ...

measure
1. To make a measurement or measurements. ... 2. To result, or turn out, on measuring; as, the grain measures well; the pieces measure unequally. ... 3. To be of a certain size or quantity, or to have a certain length, breadth, or thickness, or a certain capacity according to a standard measure; as, cloth measures three fourths of a yard; a tree meas …

measured intelligence
That intelligence which can be ranked relative to an age or peer group quantitative index by use of scores on intelligence tests. ... (05 Mar 2000) ...

measurement
Determination of a dimension or quantity. ... (05 Mar 2000) ...

measures of central tendency
General term for several characteristics of the distribution of a set of measurements or values around a value or values at or near the middle of the set; the principal measures of central tendency are mean, median, and mode. ... (05 Mar 2000) ...

measuring
Used in, or adapted for, ascertaining measurements, or dividing by measure. Measuring faucet, a faucet which permits only a given quantity of liquid to pass each time it is opened, or one by means of which the liquid which passes can be measured. ... <zoology> Measuring worm, the larva of any geometrid moth. See Geometrid. ... Source: Websters …

meat
1. Food, in general; anything eaten for nourishment, either by man or beast. Hence, the edible part of anything; as, the meat of a lobster, a nut, or an egg. 'And God said, Behold, I have given you every herb bearing seed, . . . To you it shall be for meat.' (Gen. I. 29) 'Every moving thing that liveth shall be meat for you.' (Gen. Ix. 3) ... 2. The …

meat products
Articles of food which are derived by a process of manufacture from any portion of carcasses of any animal used for food (e.g., head cheese, sausage, scrapple). ... (12 Dec 1998) ...

meat-packing industry
The aggregate enterprise of technically producing packaged meat. ... (12 Dec 1998) ...

meatal
Relating to a meatus. ... (05 Mar 2000) ...

meatal cartilage
Synonym for cartilage of acoustic meatus ... The cartilage that forms the wall of the lateral part of the external acoustic meatus. It is incomplete above and is firmly attached to the margins of the bony part of the external meatus. ... Synonym: cartilago meatus acustici, meatal cartilage. ... (05 Mar 2000) ...

meatal spine
Synonym for suprameatal spine ... Small bony prominence anterior to the supramastoid pit at the posterosuperior margin of the bony external acoustic meatus. ... Synonym: spina suprameatica, Henle's spine, meatal spine, spina meatus. ... (05 Mar 2000) ...

meato-
Meatus. ... Origin: L. Meatus, passage ... (05 Mar 2000) ...

meatometer
An instrument for measuring the size of a meatus, especially the meatus of the urethra. ... Origin: meato-+ G. Metron, measure ... (05 Mar 2000) ...

meatoplasty
Plastic surgery of a meatus or canal, e.g., the external auditory meatus or the urethral meatus. ... (05 Mar 2000) ...

meatorrhaphy
Closing by suture of the wound made by performing a meatomy. ... Origin: meato-+ G. Rhaphe, suture ... (05 Mar 2000) ...

meatoscopy
Inspection, usually instrumental, of any meatus, especially of the meatus of the urethra. ... Origin: meato-+ G. Skopeo, to view ... (05 Mar 2000) ...

meatotomy
<procedure> An incision made to enlarge a meatus, e.g., of the urethra or ureter. ... Origin: meato-+ G. Tome, incision ... (05 Mar 2000) ...

meatus
<anatomy> A natural passage or canal; as, the external auditory meatus. ... Origin: L, a going, passage, fr. Meare to go. ... (11 Mar 1998) ...

meatus acusticus externus
Synonym for external acoustic meatus ... The passage leading inward through the tympanic portion of the temporal bone, from the auricle to the tympanic membrane; it consists of a bony (inner) portion and a fibrocartilaginous (outer) portion, the cartilaginous external acoustic meatus. ... Synonym: meatus acusticus externus, acoustic meatus, antrum au …

meatus acusticus internus
internal acoustic meatus ...

meatus nasi
Synonym for nasal meatus ... Any of three passages in the nasal cavity formed by the projection of the conchae: middle nasal meatus, lies below the inferior concha; middle nasal meatus, lies between the middle and inferior conchae; superior nasal meatus, lies between the superior and middle conchae. ... Synonym: meatus nasi. ... (05 Mar 2000) ...

meatus nasopharyngeus
Synonym for nasopharyngeal passage ... The posterior part of the nasal cavity from the posterior limits of the conchae to the choanae. ... Synonym: meatus nasopharyngeus. ... (05 Mar 2000) ...

meatus urinarius
Synonym for external urethral orifice ... The slitlike opening of the urethra in the glans penis, the external orifice of the urethra (in the female) in the vestibule, usually upon a slight elevation, the papilla urethrae. ... Synonym: ostium urethrae externum, external opening of urethra, meatus urinarius, orificium urethrae externum. ... (05 Mar 200 …

mebanazine
(1-Phenylethyl)methylbenzyl)hydrazine;an antidepressant with inhibitory effect on monoamine oxidase. ... (05 Mar 2000) ...

mebendazole
<chemical> Methyl-5-benzoyl-2-benzimidazolecarbamate. A nematocide in humans and animals. It acts by interfering with the carbohydrate metabolism and associated energy production of the parasite. ... Pharmacological action: antinematodal agent. ... Chemical name: Carbamic acid, (5-benzoyl-1H-benzimidazol-2-yl)-, methyl ester ... (12 Dec 1998) …

mebeverine hydrochloride
4-[Ethyl(p-methoxy-alpha-methylphenethyl)amino] butyl veratrate hydrochloride;an intestinal antispasmodic. ... (05 Mar 2000) ...

mebhydroline
5-Benzyl-2,3,4,5-tetrahydro-2-methyl-1H-pyrido[4,3-b]indole;an antihistaminic. ... (05 Mar 2000) ...

mebrophenhydramine
2-(p-Bromo-alpha-methyl-alpha-phenylbenzyloxy)-N,N-dimethylethylamine;an antihistaminic. ... (05 Mar 2000) ...

mebutamate
Carbamic acid 2-sec-butyl-2-methyltrimethylene ester;chemically, it differs only slightly from meprobamate, and possesses similar CNS-depressant properties. ... (05 Mar 2000) ...

mecamylamine
<chemical> A nicotinic antagonist that is well absorbed from the gastrointestinal tract and crosses the blood-brain barrier. Mecamylamine has been used as a ganglionic blocker in treating hypertension, but, like most ganglionic blockers, is more often used now as a research tool. ... Pharmacological action: antihypertensive agents, ganglionic …

mecamylamine hydrochloride
3-Methylaminoisocamphane hydrochloride;a secondary amine that blocks transmission of impulses at autonomic ganglia (similar to but more effective than hexamethonium); used in the management of severe hypertension. ... (05 Mar 2000) ...

Mecca balsam
Synonym for balm of Gilead ... An oleoresin from Commiphora opobalsamum (family Burseraceae), probably the myrrh of the Bible; used in perfumery. ... Synonym: Mecca balsam, opobalsamum. ... (05 Mar 2000) ...

mechanic
1. The art of the application of the laws of motion or force to construction. ... 2. A mechanician; an artisan; an artificer; one who practices any mechanic art; one skilled or employed in shaping and uniting materials, as wood, metal, etc, into any kind of structure, machine, or other object, requiring the use of tools, or instruments. 'An art quit …

mechanical
1. Pertaining to, governed by, or in accordance with, mechanics, or the laws of motion; pertaining to the quantitative relations of force and matter, as distinguished from mental, vital, chemical, etc.; as, mechanical principles; a mechanical theory; mechanical deposits. ... 2. Of or pertaining to a machine or to machinery or tools; made or formed b …

mechanical abrasion
Synonym for dermabrasion ... <procedure, surgery> A surgical procedure which involves the controlled abrasion of the upper layers of the skin to smoothen the skin and remove wrinkles, small scars or foreign bodies (tattoos). ... (27 Sep 1997) ...

mechanical alternation of the heart
A disorder in which contractions of the heart are regular but are alternately stronger and weaker. ... (05 Mar 2000) ...

mechanical antidote
A substance that prevents the absorption of a poison. ... (05 Mar 2000) ...

mechanical dysmenorrhoea
Dysmenorrhoea due to obstruction of discharge of menstrual blood, as in cervical stenosis. ... Synonym: obstructive dysmenorrhoea. ... (05 Mar 2000) ...

mechanical heart
Term loosely applied to any mechanical circulatory assist device. ... (05 Mar 2000) ...

mechanical ileus
Obstruction of the bowel due to some mechanical cause, e.g., volvulus, gallstone, adhesions. ... (05 Mar 2000) ...

mechanical intelligence
The capacity to understand and manage technical mechanisms. ... (05 Mar 2000) ...

mechanical jaundice
Synonym for obstructive jaundice ... Jaundice resulting from obstruction to the flow of bile into the duodenum, whether intra-or extrahepatic. ... Synonym: mechanical jaundice. ... (05 Mar 2000) ...

mechanical stage
<microscopy> A device provided for adjusting the position of a specimen, usually by translation in two directions at right angles to each other. ... (05 Aug 1998) ...

mechanical strabismus
Strabismus due to restriction of action of the ocular muscle within the orbit. ... (05 Mar 2000) ...

mechanical tubelength
<microscopy> Measurement from the shoulder of the objective to the upper end of the drawtube. The generally accepted length for most microscopes is now 160 mm. Metallographic objectives and some others are corrected for use with longer tube lengths - 190 to 215 mm or more. ... See: optical tubelength. ... (05 Aug 1998) ...

mechanical vector
A vector that conveys pathogens to a susceptible individual without essential biological development of the pathogens in the vector, as in the transfer of septic organisms on the feet or mouth parts of the housefly. ... (05 Mar 2000) ...

mechanical ventilation
<anaesthetics> Mechanically assisted breathing using a electrically powered device that forces oxygenated air into the lungs and then allow time for passive exhalation of air. ... (27 Sep 1997) ...

mechanical ventilator
<apparatus> Mechanically assisted breathing using a electrically powered device that forces oxygenated air into the lungs and then allow time for passive exhalation of air. ... (27 Sep 1997) ...

mechanical vertigo
Vertigo caused by continued rotation or vibration of the body. ... (05 Mar 2000) ...

mechanically balanced occlusion
A balanced occlusion without reference to physiologic considerations, as on an articulator. ... (05 Mar 2000) ...

mechanicoreceptor
Synonym for mechanoreceptor ... A receptor which responds to mechanical pressure or distortion; e.g., receptors in the carotid sinuses, touch receptors in the skin. ... Synonym: mechanicoreceptor. ... (05 Mar 2000) ...

mechanics
That science, or branch of applied mathematics, which treats of the action of forces on bodies. ... That part of mechanics which considers the action of forces in producing rest or equilibrium is called statics; that which relates to such action in producing motion is called dynamics. The term mechanics includes the action of forces on all bodies, w …

mechanism
The manner of combination of parts, processes, etc., which subserve a common function. ... Origin: Gr. Mechan = machine ... (18 Nov 1997) ...

mechanism-based inhibitor
Synonym for suicide substrate ... A competitive inhibitor that is converted to an irreversible inhibitor at the active site of the enzyme. ... Synonym: mechanism-based inhibitor. ... (05 Mar 2000) ...

mechanistic school
Synonym for iatromathematical school ... A group of academicians, of whom Descartes was one of the foremost proponents, who maintained that all physiologic processes were the result of physical laws. ... Synonym: mechanistic school. ... (05 Mar 2000) ...

mechanobullous disease
Synonym for epidermolysis bullosa ... This represents a group of rare inherited disorders in which blistering of the skin occurs in response to skin trauma. Large fluid-filled blisters can occur in response to injury, skin rubbing, chafing or even increases in room temperature. Secondary bacterial infection of the blisters is common. Complications i …