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maleic acid
Butenedioic acid; the cis isomer of fumaric acid; used for preparing maleate salts of antihistaminics and similar drugs. SYN: toxilic acid.
Failure to eject semen from the penis at orgasm. [ mal- + L. e-mitto, pp. missus, to send out]
Faulty eruption of teeth.
An intermediate in l-phenylalanine and l-tyrosine catabolism; accumulates in certain inherited disorders of tyrosine metabolism. - m. cis,trans-isomerase an enzyme that ...
Failure of proper or normal development; more specifically, a primary structural defect that results from a localized error of morphogenesis; e.g., cleft lip. Cf.:deformation. - ...
Malformation, arteriovenous
An arteriovenous malformation (AVM) is a congenital disorder (one present at birth) of blood vessels in the brain, brainstem, or spinal cord that is characterized by a complex, ...
Malformation, arteriovenous (AVM)
An arteriovenous malformation (AVM) is a congenital disorder (one present at birth) of blood vessels in the brain, brainstem, or spinal cord that is characterized by a complex, ...
Malformation, congenital
A physical defect present in a baby at birth, irrespective of whether the defect is caused by a genetic factor or by prenatal events that are not genetic. In a malformation, the ...
Disordered, inadequate, or abnormal function.
Joseph F., French surgeon, 1806–1865. See M. amputation, M. fossa, M. hernia, M. luxation, M. triangle.
Albert, 1845–1915. See M. calcifying epithelioma.
malic acid
Hydroxysuccinic acid; an acid found in apples and various other tart fruits; an intermediate in the tricarboxylic acid cycle, the glyoxylate cycle, and in a shuttle system. SYN: ...
malic acid dehydrogenase
SYN: malate dehydrogenase.
malic dehydrogenase
SYN: malate dehydrogenase.
The property or condition of being malignant.
1. Resistant to treatment; occurring in severe form, and frequently fatal; tending to become worse and leading to an ingravescent course. 2. In reference to a neoplasm, having ...
Malignant giant cell tumor
: A type of bone tumor characterized by massive destruction of bone near the end (epiphysis) of a long bone. The site most commonly struck by this tumor is the knee — the far ...
To engage in malingering.
One who engages in malingering.
Feigning illness or disability to escape work, excite sympathy, or gain compensation. [Fr. malingre, poor, weakly]
Faulty intercuspation of teeth.
Franklin Paine, U.S. anatomist and embryologist, 1862–1917. See M. formula, M. ridges, under ridge, periportal space of M..
Capable of being shaped by being beaten or by pressure; a property of certain metals such as gold and silver. [L. malleus, a hammer]
SYN: aluminum chlorate nonahydrate.
Relating to the malleus and the incus in the tympanum.
Relating to one or both malleoli.
A rounded bony prominence such as those on either side of the ankle joint. [L. dim. of malleus, hammer] - external m. SYN: lateral m.. - inner m. SYN: medial m.. - internal m. ...
Division of the malleus. [ malleus + G. tome, incision]
Tiny bone truly shaped like a minute mallet in the middle ear. * * * The largest of the three auditory ossicles, resembling a club rather than a hammer; it is regarded as having ...
An order of biting lice that cause irritation by feeding on hair, feathers, and skin, and on blood and exudates when present; most species are found on birds, but some are found ...
G. Kenneth, U.S. pathologist, *1926. See M.- Weiss lesion, M.- Weiss syndrome, M.- Weiss tear. Frank B., U.S. pathologist, 1862–1941. See M. bodies, under body, picro-M. ...
Faulty nutrition resulting from malabsorption, poor diet, or overeating. - malignant m. SYN: kwashiorkor. - protein m. undernutrition resulting from inadequate intake of ...
1. Any deviation from a physiologically acceptable contact of opposing dentitions. 2. Any deviation from a normal occlusion.
The salt or ester of malonic acid.
malonate semialdehyde
The transaminated product of β-alanine; elevated in hyper-β-alaninemia.
Maloney bougies
See under bougie.
malonic acid
A dicarboxylic acid of importance in intermediary metabolism; an inhibitor of succinate dehydrogenase. SYN: propanedioic acid.
The divalent moiety derived from malonic acid. - m. transacylase SYN: ACP-malonyltransferase.
The condensation product of malonic acid and coenzyme A, an intermediate in fatty acid biosynthesis. SYN: malonylcoenzyme A.
malonylcoenzyme A
SYN: malonyl-CoA.
SYN: barbituric acid.
Marcello, Italian anatomist, histologist, and embryologist, 1628–1694. See malpighian bodies, under body, malpighian capsule, malpighian cell, malpighian corpuscles, under ...
Described by or attributed to Marcello Malpighi.
SYN: dystopia.
Mistreatment of a patient through ignorance, carelessness, neglect, or criminal intent.
Faulty presentation of the fetus; presentation of any part other than the occiput.
Malrotated ear
An ear that is slanted more than usual. Technically, an ear is slanted when the angle of the slope of the auricle is more than 15 degrees from the perpendicular. Slanted ears ...
Failure during embryonic development of normal rotation of all or part of an organ or system such as gut tube or kidney.
Malrotation of the intestine
Failure for the intestine to rotate normally during embryonic development.
Abbreviation for mucosa-associated lymphoid tissue.
The seed of barley or other grain, artificially germinated and dried, containing dextrin, maltose, small amounts of glucose, and amylolytic enzymes. Used in the form of an ...
See α-d-glucosidase. - acid m. SYN: exo-1,4-α-d-glucosidase.
SYN: maltose.
B-cell lymphoma of mucosa-associated lymphoid tissue. SYN: extranodal marginal zone lymphoma.
A disaccharide formed in the hydrolysis of starch and consisting of two d-glucose residues bound by a 1,4-α-glycoside link. SYN: malt sugar, maltobiose.
A saccharide composed of four d-glucose units in the α-1,4 linkage.
A disease. [L. an evil] - m. articulorum senilis arthritis in the aged. - m. perforans pedis perforating ulcer of the foot occurring in certain neuropathies. - m. venereum SYN: ...
Union of the ends of a broken bone resulting in a deformity or a crooked limb; frequently used interchangeably with faulty union. SYN: vicious union.
Formerly used term for mother yaw. [Fr. maman, mother + pian, yaw]
One of the rounded prominences, three in number, on the cutting edge of an incisor tooth when it first pierces the gum. [Fr. nipple]
Having rounded, teatlike elevations; nodulated. [Fr. mamelon, nipple]
The formation of rounded projections or nodules on bony and other structures.
mamil-, mamilli-
The mamillae. SEE ALSO: mammil-. Cf.:thelo-. [L. mamilla, nipple]
SYN: breast. SEE ALSO: mammary gland. [L.] - m. accessoria [TA] SYN: accessory breast. - m. erratica a supernumerary breast aberrantly located, i.e., in some part other than the ...
An animal of the class Mammalia.
SYN: mastodynia. [L. mamma, breast, + G. algos, pain]
The highest class of living organisms; it includes all the vertebrate animals (monotremes, marsupials, and placentals) that suckle their young, possess hair, and (except for the ...
Plastic surgery of the breast to alter its shape, size, or position, or all of these. SYN: mammoplasty, mastoplasty. [L. mamma, breast, + G. plastos, formed] - augmentation m. ...
Relating to the breasts.
Mammary gland
One of the two half-moon-shaped glands on either side of the adult female chest, which with fatty tissue and the nipple make up the breast. Within each mammary gland is a ...
SYN: mastectomy. [L. mamma, breast, + ektome, excision]
Resembling a breast; breast-shaped. SYN: mammose (1). [L. mamma, breast, + forma, form]
mammil-, mammilli-
The mamillae. SEE ALSO: mamil-. Cf.:thelo-. [L. mammilla (mamilla), nipple]
1. A small rounded elevation resembling the female breast. 2. SYN: nipple. [L. nipple]
Plastic surgery of the nipple and areola. [L. mammilla, nipple, + G. plastos, formed]
SYN: mammillary. [L.]
See mammillary body.
Relating to or shaped like a nipple. SYN: mammillare [TA].
Studded with nipple-like projections.
1. A nipple-like projection. 2. The condition of being mamillated.
Nipple-shaped. [L. mamilla, nipple, + forma, form]
Inflammation of the nipple. [L., mamilla, nipple, + G. -itis, inflammation]
The breasts. Cf.:masto-. [L. mamma, breast]
An X-ray of the breast with the breast in a device that compresses and flattens it. There are two basic mammogram tests — screening mammograms and diagnostic mammograms. A ...
Radiologic examination of the female breast with equipment and techniques designed to screen for cancer. [ mammo- + G. grapho, to write] M. can detect carcinoma of the breast ...
Genus of syngamid trematode (family Syngamidae) found in the respiratory system of ruminants and occasionally reported in humans; worms usually joined together in a Y-shaped ...
SYN: mammaplasty. [ mammo- + G. plastos, formed]
1. SYN: mammiform. 2. Having large breasts.
A cell of the adenohypophysis that produces prolactin and somatotropin.
SYN: mastotomy. [ mammo- + G. tome, incision]
An acidophilic cell of the adenohypophysis that produces prolactin. SYN: prolactin cell.
mammotropic, mammotrophic
Having a stimulating effect upon the development, growth, or function of the mammary glands. [ mammo- + G. tropos, a turning]
mammotropin, mammotrophin
Obsolete term for prolactin.
Symbol for mannose and mannosyl.
Portuguese m. SYN: Physalia physalis.
man. pr.
Abbreviation for L. mane primo, early morning, first thing in the morning.
Managed care
Any system that manages healthcare delivery to control costs. Typically, managed care systems rely on a primary care physician who acts as a gatekeeper for other services, such ...
case m. a process whereby covered persons with specific health care needs are identified and an efficient treatment plan formulated and implemented to produce the most ...
A conical array of microtubules that invests the nucleus of a spermatid; believed to play a role in shaping the nucleus during spermatogenesis. [Fr. cuff, dim. of manche, ...
A salt or ester of mandelic acid.
mandelic acid
A urinary antibacterial agent (both bactericidal and bacteriostatic). SYN: hydroxytoluic acid, phenylglycolic acid. [Ger. Mandel, almond]
Mandelin reagent
See under reagent.
SYN: homatropine.
The mandible is the bone of the lower jaw. The joint where the mandible meets the upper jaw at the temporal bone is called the temporomandibular joint. * * * A U-shaped bone ...
SYN: mandible. [L. a jaw, fr. mando, pp. mansus, to chew]
Relating to the lower jaw. SYN: inframaxillary, submaxillary (1).
Resection of the lower jaw. [mandibula + G. ektome, excision]
Relating to the mandible and the orbital part of the face.
Relating to the mandible and the face.
Relating to the mandible and the pharynx; denoting the region between the pharynx and the ramus of the mandible, in which are found the internal carotid artery, the internal ...
SYN: mandible.
The European mandrake, M. officinalis, or Atropa m. (family Solanaceae), the mandrake of the Bible; its properties are similar to those of stramonium, hyoscyamus, and ...
1. See mandragora. 2. See podophyllum. [thr. L., fr. G. mandragoras] - wild m. SYN: podophyllum resin.
mandrel, mandril
1. The shaft or spindle to which a tool is attached and by means of which it is rotated. 2. SYN: mandrin. 3. In dentistry, an instrument used in a handpiece to hold a disk, ...
Common name for a species of monkey of the genus Cynocephalus, with a short tail and doglike head.
A stiff wire or stylet inserted in the lumen of a soft catheter to give it shape and firmness while passing through a hollow tubular structure. SYN: mandrel (2), mandril. [Fr. ...
A planned movement or procedure. [Fr. manoeuvre, fr. L. manu operari, to work by hand] - Adson m. SYN: Adson test. - Barlow m. test for hip instability, with dislocation ...
Maneuver, Heimlich
An emergency treatment for obstruction of the airway in adults. It may be needed when someone chokes on a piece of food that has "gone down the wrong way." To perform the ...
Maneuver, Valsalva
A maneuver in which a person tries to exhale forcibly with a closed glottis (the windpipe) so that no air exits through the mouth or nose as, for example, in strenuous ...
A metallic element resembling and often associated, particularly in ores, with iron; atomic no. 25, atomic wt. 54.94; manganous salts are sometimes used in medicine. SYN: ...
Denoting the trivalent cation of manganese, Mn3+.
Denoting the divalent cation of manganese, Mn2+.
SYN: manganese. [L.]
A cutaneous disease of domestic and wild animals caused by any one of several genera of skin-burrowing mites; in humans, mite infestations are usually referred to as scabies. ...
John H., U.S. dentist, *1919 See Volpe-M. Index.
An abnormally elevated mood state characterized by such symptoms as inappropriate elation, increased irritability, severe insomnia, grandiose notions, increased speed and/or ...
1. Obsolete term for a mentally ill or disturbed person. 2. One suffering from mania.
Relating to or characterized by mania. See amok. SYN: manic.
Refers to a mood disorder in which a person seems "high", euphoric, expansive, sometimes agitated, hyperexcitable, with flights of ideas and speech. * * * SYN: ...
1. Pertaining to a m. psychosis ( bipolar disorder). 2. One suffering from such a disorder.
Manicheel tree
A dangerous tropical tree whose sap is highly poisonous and corrosive. The sap comes out when a leaf is crushed, a branch broken, or the fruit of the tree eaten. The manicheel is ...
Behavior characteristic of the manic phase of bipolar disorder.
The display or disclosure of characteristic signs or symptoms of an illness. [L. manifestus, caught in the act] - behavioral m. a m. characterized by defects in personality ...
A model, especially one with removable pieces, of the human body or any of its parts. SEE ALSO: phantom (2). [dim. of man]
A phalanx of the hand; a bony segment of a finger; distinguished from pediphalanx. [L. manus, hand, + phalanx]
Frank C., U.S. surgeon, 1887–1962. See M.- Bollman fistula, M.- Williamson operation, M.- Williamson ulcer.
A saccharine exudation from Fraxinus ornus, flowering ash, a tree of the Mediterranean shores, used as a laxative, especially for children. It is available as m. cannellata, a ...
1. Polysaccharides of mannose, found in various legumes and in the ivory nut. 2. Polysaccharides in which mannose is the monosaccharide present in highest proportion. SYN: ...
A peculiar or unusual characteristic mode of movement, action, or speech.
SYN: mannitol.
The hexahydric alcohol, widespread in plants, derived by reduction of fructose; used in renal function testing to measure glomerular filtration, and intravenously as an osmotic ...
Emil W., German physician, 1836–1918. See M. sign.
See d-manno-heptulose.
1-6-Bis(2-chloroethylamino)-1,6-dideoxy-d-mannitol dihydrochloride; an antineoplastic agent.
Yeast cell wall components that are proteins with large numbers of mannose groups attached; highly antigenic.
2-Amino-2-deoxymannose; the d-isomer is a constituent of neuraminic acid s as well as mucolipids and mucoproteins.
SYN: mannans.
An aldohexose obtained from various plant sources ( i.e., from mannans); an epimer of glucose.
mannose-1-phosphate guanylyltransferase
A transferase that catalyzes the reaction of GTP and mannose 1-phosphate to produce GDPmannose and pyrophosphate. SYN: GDPmannose phosphorylase.
mannosephosphate isomerase
An enzyme that catalyzes the reversible conversion of d-mannose 6-phosphate to d-fructose 6-phosphate; a key step in the synthesis of mannose derivatives, as well as the entry of ...
A group of enzymes that catalyze the hydrolysis of terminal, non-reducing d-mannose residues of mannosides (particularly in glycoproteins and glycolipids); α-m. act on ...
A glycoside of mannose.
Congenital deficiency of α-mannosidase; associated with coarse facial features, enlarged tongue, mental retardation, kyphosis, radiographic skeletal abnormalities, and ...
mannuronic acid
Uronic acid derived from the oxidation of mannose; a component of alginic acid.
An instrument for indicating the pressure of any fluid or the difference in pressure between two fluids, whether gas or liquid. [G. manos, thin, scanty, + metron, measure] - ...
Relating to a manometer.
Measurement of the pressure of gases or fluids by means of a manometer. SYN: manoscopy. [see manometer] - esophageal m. measurement of intra-esophageal pressures at one or more ...
SYN: manometry.
Sir Patrick, English authority on tropical medicine, 1844–1922. See Mansonella, Mansonia, M. disease, M. schistosomiasis, Schistosoma mansoni, schistosomiasis mansoni, M. ...
A genus of filaria, widely distributed in tropical Africa and South America, that infects the peritoneal cavity, serous surfaces, or skin of humans and other primates with ...
Infection with a species of Mansonella, transmitted to humans by biting midges of the genus Culicoides; adult worms live in the serous cavities, especially the peritoneal ...
Infection with the filarial parasite Mansonella ozzardi.
A genus of brown or black medium-sized mosquitoes ( tribe Culicini), often having banded abdomen and legs; larvae and pupae have modified breathing tubes enabling them to pierce ...
A subgenus of Mansonia.
Nathan, U.S. biostatistician, *1927. See M.-Haenszel test.
1. A covering layer. 2. SYN: cerebral cortex. - brain m. SYN: cerebral cortex. - myoepicardial m. the dorsal wall of the primitive pericardium which, in the early somite ...
Charles, French physician, 1877–1947. See M. pit, M. test.
manual English
A means of communicating in English with a person with profound hearing impairment by a combination of signs, finger spelling, and gestures.
The portion of the sternum or of the malleus that represents the handle of a sword or hammer. [L. handle] - m. mallei SYN: m. of malleus. - m. of malleus the handle of the ...
In dentistry, a device for measuring the force exerted by the thrust of an instrument. [L. manus, hand, + G. dynamis, force, + metron, measure]
SYN: hand. [L.]
Abbreviation for monoamine oxidase.
MAO inhibitor
Monoamine oxidase inhibitor. One of a potent class of medications used to treat depression.
Monoamine oxidase inhibitor. One of a potent class of medications used to treat depression. * * * Abbreviation for monoamine oxidase inhibitor.
A representation of a region or structure; E.G., of a stretch of DNA. - choroplethic m. a method of mapping to display quantitative information such as death rates in defined ...
map distance
The degree of separation of two loci on a linkage map, measured in morgans or centimorgans.
Map, contig
A map depicting the relative order of a linked library of small overlapping clones representing a complete chromosome segment. A contig is a chromosome map showing the ...
Map, cytogenetic
A genetic term referring to the visual appearance of a chromosome when stained and examined under a microscope. Particularly important are visually distinct regions, called light ...
Map, linkage
A map of the genes on a chromosome based on linkage analysis. A linkage map does not show the physical distances between genes but rather their relative positions, as determined ...
Map, physical
A map of the locations of identifiable landmarks on chromosomes. Physical distance is measured in base pairs. The physical map differs from the genetic map which is based purely ...
Map-dot-fingerprint type corneal dystrophy
A disorder in which the cornea (the normally clear front window of the eye) shows geographic map-like lines, dots (or microcysts), and grayish fingerprint lines on examination ...
Maple syrup urine disease (MSUD)
Hereditary disease due to deficiency of an enzyme involved in amino acid metabolism, characterized by urine that smells like maple syrup.
SYN: bufotenine.
The process of identifying the relative position of sites or elements. - cardiac m. a method by which local cardiac potentials are spatially depicted in an integrated manner as a ...
mapping function
In linkage analysis, a formula that converts the recombination fraction (which is on the probability scale) into map distance (in morgans).
Mapping, gene
The process of determining the relative positions of genes on a chromosome (or another piece of DNA) and the distances between the genes in linkage units or in physical units.
A tricyclic antidepressant used in the treatment of various depressive illnesses, and for relief of anxiety associated with depression.
Abbreviation for microtubule-associated proteins, under protein.
Gregorio, Spanish endocrinologist, 1887–1960. See M. sign, syndrome.
SYN: marasmic. [G. marantikos, wasting]
Relating to or suffering from marasmus. SYN: marantic.
Resembling marasmus. [G. marasmos, withering, + eidos, resemblance]
Wasting away, as occurs with children who have kwashiorkor. Also called cachexia, is usually a result of protein and calorie deficiency. * * * Cachexia, especially in young ...
Marburg disease
A severe form of hemorrhagic fever which affects both humans and non-human primates. Caused by a genetically unique zoonotic (that is, animal-borne) RNA virus of the filovirus ...
Marburg virus
The virus that causes Marburg hemorrhagic fever, a disease which affects both humans and non-human primates. Caused by a genetically unique zoonotic (that is, animal-borne) RNA ...
The residue remaining after percolation of a drug. [Fr. fr. marcher, to trample]
Arturo, Italian physiologist, 1854–1915. See M. muscle.
Felix J., German pathologist, 1846–1928. See M. adrenals, under adrenal, M. rest, M. wandering cell.
Gérard T.J., French surgeon, 1850–1903. See M. zone.
Oswald, 1900–1952. See Weill-M. syndrome.
Andrew A., U.S. obstetrician and gynecologist, 1901–1970. See Marshall-M. test, Marshall-M.- Krantz operation.
Vittorio, Italian physician, 1851–1908. See M. fixative, M. reaction, M. stain, M. tract.
Ettore, Italian pathologist, 1847–1935. See M.- Bignami disease, M.- Micheli anemia, M.- Micheli syndrome.
Emaciating; wasting away. [L. marcidus; fr. marceo, to wither]
Maurice, 1871–1941. See M. triangle.
Obsolete term for marasmus. [L. fr. marceo, to wither]
Marcus Gunn
Robert. See Gunn.
Josef, Hungarian veterinarian and pathologist, 1868–1952. See M. disease virus.
SYN: pyrin.
Étienne Jules, French physiologist, 1830–1904. See M. law.
Antoine Bernard-Jean, French pediatrician, 1858–1942. See M. disease, M. law, M. syndrome.
Marfan syndrome
Inherited disorder characterized by long fingers and toes, dislocation of the lens, and aortic wall weakness and aneurysm. Parents with Marfan syndrome have a 50 percent chance ...
A term used of those whose phenotype bears a superficial resemblence to that of Marfan syndrome.
Elwin, U.S. physicist, *1918. See Mackay-M. tonometer.
A genus of ixodid ticks closely resembling Boophilus, but not having festoons or ornamentations; they are characterized by greatly enlarged posterior legs and a prolonged median ...
A boundary, edge, or border, as of a surface or structure. SEE ALSO: border, edge. SYN: margo [TA]. [L. margo, border, edge] - acetabular m. [TA] the rim of bone around the ...
Relating to a margin.
Marginal Line Calculus Index
An index which scores supragingival calculus found in cervical areas paralleling marginal gingiva.
A phenomenon that occurs during the relatively early phases of inflammation; as a result of dilation of capillaries and slowing of the bloodstream, leukocytes tend to occupy the ...
Plural of margo. [L.]
SYN: margin, border. [L.] - m. acetabularis acetabular margin. - m. anterior [TA] SYN: anterior border. - m. anterior corporis pancreatis [TA] SYN: anterior border of body of ...
Pierre, French neurologist, 1853–1940. See M. ataxia, Charcot-M.-Tooth disease, Bamberger-M. disease, Bamberger-M. syndrome, M.- Strümpell disease, Strümpell-M. disease, ...
Popular name for the dried flowering leaves of Cannabis sativa, which are smoked as cigarettes, “joints,” or “reefers.” In the U.S. m. includes any part of, or any ...
A very common street and recreational drug that comes from the marijuana plant. The plant that produces marijuana, as is well known, is the hemp plant cannabis sativa. The ...
Georges, Roumanian neurologist, 1863–1938. See M. succulent hand, M.-Garland syndrome, M.-Sjögren syndrome.
Marinesco-Sjogren syndrome
A genetic disorder characterized by very small stature, cerebellar ataxia (wobbliness), cataracts, muscle weakness, hypogonadism (low gonadal function), and developmental and ...
A poison produced by the parotid gland of Bufo marinus (family Bufonidae), a large toad native to Central and South America; used in tropical countries for insect control.
Georges, French urologist, 1869–1932. See M. disease.
Edmé, French physicist, 1620–1684. See M. bottle, M. experiment, M. law, M. blind spot.
Thallasoposia; rarely used term for abnormal consumption of sea water as a result of psychogenic factors. SYN: thalassoposia. [L. mare, the sea, + G. posis, drinking]
Jean N., French physician, 1780–1850. See M. ulcer.
Sweet, leaf, or garden m. whose leaves, with and without a small portion of the flowering tops of Majorana hortensis (Origanum majorana) (family Labiatae), are used as seasoning ...
1. Any spot, line, or other figure on the cutaneous or mucocutaneous surface, visible through difference in color, elevation, or other peculiarity. [A.S. mearc] - alignment m. ...
Mark of Cain
The mark that God set upon Cain, the eldest son of Adam. According to the Book of Genesis in the Bible, God rejected Cain's grain offering while accepting the animal offering of ...
A piece of DNA that lies on a chromosome so close to a gene that the marker and the gene are inherited together. A marker is thus an identifiable heritable spot on a chromosome. A ...
Marker chromosome
An abnormal chromosome that is distinctive in appearance but not fully identified. A marker chromosome is not a " marker" of a specific disease. It is a marker chromosome merely ...
Marker gene
A detectable genetic trait or segment of DNA that can be identified and tracked. A marker gene can serve as a flag for another gene, sometimes called the target gene. A marker ...
Marker, blood
A sign of a disease or condition that can be isolated from a blood sample. For example, the monoclonal antibody D8/17 is a diagnostic sign of Pediatric Autoimmune Disorders ...
Marker, tumor
: Tumor markers are substances that can be detected in higher-than-normal amounts in the blood, urine, or body tissues of some patients with certain types of cancer. A tumor ...
Andrei, Russian mathematician, 1865–1922. See M. process.
Marme reagent
See under reagent.
Denoting a condition in which the appearance of the skin is streaked like marble. SEE ALSO: cutis marmorata. [L. marmoratus, marbled]
A woodchuck or groundhog; a hibernating rodent that may serve as reservoir host of plague bacillus in North America. [Fr. marmotte]
Pierre, French medical geneticist, *1926. See M.- Lamy syndrome.
Maroteaux-Lamy syndrome
A form of mucopolysaccharidosis with onset before age three, Maroteaux-Lamy syndrome is characterized inability to metabolize dermatin sulfate. This leads to abnormal ...
Marquis reagent
See under reagent.
Marriage, cousin
A form of consanguinity. Everyone carries recessive alleles, genes that are generally innocuous in the heterozygous state but that in the company of another gene of the same ...
The bone marrow. * * * 1. A highly cellular hematopoietic connective tissue filling the medullary cavities and spongy epiphyses of bones; it becomes predominantly fatty with ...
Don, U.S. ophthalmologist, *1905. See M. syndrome. Eli K., U.S. pharmacologist, 1889–1966. See M. method. John, English anatomist, 1818–1891. See M. vestigial fold, M. ...
Marshallagia marshalli
One of the medium stomach worms of the nematode family Trichostrongylidae, found in the abomasum of sheep, goats, camels, and various wild ruminants.
marshmallow root
SYN: althea.
1. A member of the order Marsupalia, which includes such mammals as kangaroos, wombats, bandicoots, and opossums, the female of which has an abdominal pouch for carrying the ...
Exteriorization of a cyst or other such enclosed cavity by resecting the anterior wall and suturing the cut edges of the remaining wall to adjacent edges of the skin, thereby ...
1. SYN: scrotum. 2. A pouch or sac; e.g., in marsupials. [L. pouch]
J., 19th century Italian anatomist. See M. area, M. funnel.
August E., German gynecologist, 1847–1933. See M. tube, M.-Gruber anastomosis. Henry A., U.S. surgeon, 1824–1884. See M. bandage, M. disease. J.E. See Thayer-M. medium.
Giovanni, Italian physician, 1857–1928. See M. cell.
martius yellow
An acid dye used as a stain in plant and animal histology, and as a light filter for photomicrography. [Karl A. Martius, Ger. chemist, *1920]
Fernando Otzet, Spanish cardiologist, 1906–1984. See M. syndrome.
Maryland coma scale
See coma scale.
MASA syndrome
MASA stands for mental retardation, aphasia, shuffling gait, and adducted thumbs. Features of the syndrome include: {{}}neurologically: mental retardation and aphasia (lack of ...
SYN: axilla. [G.]
Excessive sweating in the axillae. [G. maschale, axilla, + hyper, over, + hidros, sweat]
Relating to or marked by the characteristics of the male sex or gender. SYN: male (2), masculinus. [L. masculus, male, fr. mas, male]

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