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Medical Dictionary


morbilliform (mor-bil′i-form)
Resembling measles (1). [see morbilli]

Morbillivirus (mor-bil′i-vi′rus)
A genus in the family Paramyxoviridae, including measles, canine distemper, and bovine rinderpest viruses. equine M. a species causing a fatal respiratory disease in horses and humans in Australia, with encephalitis also seen in some human cases. SYN: Hendra virus.

morbilous (mor-bil′us)
Relating to measles (1). [see morbilli]

morbus (mor′bus)
SYN: disease (1) . [L. disease]

morbus Addisonii (mor′bus ad′i-son-e)
SYN: chronic adrenocortical insufficiency.

morcel (mor-sel′)
To remove piecemeal. [Fr. morceler, to subdivide]

morcellation (mor-se-la′shun)
Division into and removal of small pieces, as of a tumor. SYN: morcellement. [Fr. morceler, to subdivide]

morcellement (mor-sel-maw′)
SYN: morcellation. [Fr.]

mordant (mor′dant)
1. A substance capable of combining with a dye and the material to be dyed, thereby increasing the affinity or binding of the dye; e.g., a m. commonly used to promote staining with hematoxylin is alum. 2. To treat with a m.. [L. mordeo, to bite]

mor. dict.
Abbreviation for L. m., as directed.

Benedict A., French psychiatrist, 1809–1873. See M. ear, Stewart-M. syndrome.

Morerastrongylus costaricensis (mor′er-a-stron′ji-lus kos′tar-i-sen′sis)
SYN: Angiostrongylus costaricensis.

mores (mo′raz)
A concept used in the behavioral and social sciences to refer to centrally important and accepted folkways, and cultural norms which embody the fundamental moral views of a group. [L. pl. of mos, custom]

Giovanni B., Italian anatomist and pathologist, 1682–1771. See morgagnian cyst, M. appendix, M. cartilage, M. caruncle, M. cataract, M. columns, under column, M. concha, M. crypts, under crypt, M. disease, M. foramen, M. foramen hernia, M. fossa, M. fovea, M. frenum, M. globules, under globule, M. humor, M. hydatid, M. lacuna, M. liquor, M. nodule, M. prolapse, M. retinaculum, M. sinus, M. spheres, under sphere, M. syndrome, M. tubercle, M. valves, under valve, M. ventricle, M.-Adams-Stokes syndrome, frenulum of M..

Harry de R., British physician, 1863–1931. See M. bacillus.

morgan (M) (mor′gan)
The standard unit of genetic distance on the genetic map: the distance between two loci such that on average one crossing over will occur per meiosis; for working purposes, the centimorgan (0.01 M) is used. [T.H. M., U.S. geneticist, 1866–1945]

Morganella (mor′gan-el′-ah)
A genus (family Enterobacteriaceae) of Gram-negative, facultatively anaerobic, chemoorganotrophic, straight rods that are motile by peritrichous flagella; found in feces of human beings, other animals, and reptiles; can cause opportunistic infections of the blood, respiratory tract, wounds, and urinary tract. M. morganii type species of the genus M.. SYN: Morgan bacillus.

morgue (morg)
1. A building or room in a hospital or other facility where the dead are kept pending autopsy, burial, or cremation. 2. A building where unidentified dead are kept pending identification before burial. SYN: mortuary (2) . [Fr.]

O., 20th century Japanese pathologist. See Harada-M. filter paper strip culture.

moria (mor′e-a)
1. Rarely used term denoting foolishness or dullness of comprehension. SYN: hebetude. 2. Rarely used term for a mental state marked by frivolity, joviality, an inveterate tendency to jest, and inability to take anything seriously. [G. m., folly, fr. moros, stupid, dull]

moribund (mor′i-bund)
Dying; at the point of death. [L. moribundus, dying, fr. morior, to die]

morin (mor′in) [C.I. 75660]
A natural yellow dye obtained from fustic and other members of the mulberry family and often associated with the dye maclurin; used as a fluorochrome for detection of metals, particularly aluminum. Fluorescent morinates are also formed with beryllium, gallium, indium, scandium, thorium, titanium, and zirconium.

James R., British surgeon, 1853–1939. See M. pouch.

Karl A.H., Swedish chemist, 1855–1917. See M. test.

morning glory (mor′ning glo′re)
1. SYN: Ipomoea rubrocoerulea praecox. 2. SYN: Rivea corymbosa.

morning glory seeds
The seeds of morning glories, Rivea corymbosa, have been used for mind-altering purposes; hallucinogenic; intoxicant.

Ernst, German physician, 1874–1951. See M. reflex.

moron (mor′on)
An obsolete term for a subclass of mental retardation or the individual classified therein. [G. moros, stupid]

moroxydine (mo-rok′si-den)
An antiviral agent.

See morpho-.

morphea (mor-fe′a)
Cutaneous lesion(s) characterized by indurated, slightly depressed plaques of thickened dermal fibrous tissue of a whitish or yellowish-white color surrounded by a pinkish or purplish halo. Lesions occur at any age, without systemic involvement, and usually resolve after a few years. SYN: localized scleroderma. [G. morphe, form, figure] m. guttata a form of m. with small discrete, white, waxy, indurated lesions. SYN: white spot disease. m. linearis SYN: linear scleroderma.

morpheme (mor′fem)
The smallest linguistic unit with a meaning. [G. morphe, form + -eme, from phoneme, G. pheme, utterance]

morphine (mor′fen, mor-fen′)
The major phenanthrene alkaloid of opium, which contains 9–14% of anhydrous m.. It produces a combination of depression and excitation in the central nervous system and some peripheral tissues; predominance of either central stimulation or depression depends upon the species and dose; repeated administration leads to the development of tolerance, physical dependence, and (if abused) psychic dependence. Used as an analgesic, sedative, and anxiolytic. [L. Morpheus, god of dreams or of sleep] m. hydrochloride white acicular or cubical crystals of bitter taste, soluble in about 25 parts of water. m. sulfate (MS) m. used for formulation of tablets as well as solutions for parenteral, epidural, or intrathecal injection to relieve pain.

morpho-, morph-
Form, shape, structure. [G. morphe]

morphogenesis (mor-fo-jen′e-sis)
1. Differentiation of cells and tissues in the early embryo that establishes the form and structure of the various organs and parts of the body. 2. The ability of a molecule or group of molecules (particularly macromolecules) to assume a certain shape. [morpho- + G. genesis, production]

morphogenetic (mor′fo-je-net′ik)
Relating to morphogenesis.

morphologic (mor-fo-loj′ik)
Relating to morphology.

morphology (mor-fol′o-je)
The science concerned with the configuration or the structure of animals and plants. [morpho- + G. logos, study]

morphometric (mor′fo-met′rik)
Pertaining to morphometry.

morphometry (mor-fom′e-tre)
The measurement of the form of organisms or their parts. [morpho- + G. metron, measure]

morphon (mor′fon)
Any one of the individual structures entering into the formation of an organism; a morphologic element, such as a cell. [G. morphe, form]

morphophysiology (mor-fo-fiz-e-ol′o-je)
SYN: functional anatomy.

morphosis (mor-fo′sis)
Mode of development of a part. [G. formation, act of forming]

morphosynthesis (mor-fo-sin′the-sis)
An awareness of space and of body schema represented in the parietal lobes of the cerebral cortex. [morpho- + synthesis]

morphotype (mor′fo-tip)
An infrasubspecific group of bacterial strains distinguishable from other strains of the same species on the basis of morphologic characters which may or may not be associated with a change in serologic state. [morpho- + G. typos, stamp, model]

Louis, Uruguayan physician, 1867–1935. See M. disease, M. syndrome, M.-Ullrich disease, Brailsford-M. disease.

morrhuate sodium (mor′roo-at)
The sodium salts of the fatty acids of cod liver oil; a sclerosing agent used in the treatment of varicose veins, mixed with a local anesthetic. [fr. Gadus morrhua, cod]

Ashton B., Irish pathologist in the U.S., *1922. See Verner-M. syndrome.

mors, gen. mortis (morz, mor′tis)
SYN: death. [L.] m. thymica obsolete term for sudden death in young children, usually the result of infection; formerly erroneously attributed to an enlarged thymus. SEE ALSO: sudden infant death syndrome.

morsicatio (mor-sik′a-te-o)
Habitual nibbling of the lips (labiorum), tongue (linguae), or buccal mucosa (buccarum); often produces a shaggy white lesion. [L. biting, fr. mordeo, to bite] m. buccarum white elevations of buccal mucosa caused by the pressure of molar teeth. [L. chewing of the cheeks]

mor. sol.
Abbreviation for L. more solito, as usual, as customary.

morsulus (mor′soo-lus)
SYN: troche. [Mod. L. dim. of L. morsus, a bite]

mortal (mor′tal)
1. Pertaining to or causing death. 2. Destined to die. [L. mortalis, fr. mors, death]

mortality (mor-tal′i-te)
1. The state of being mortal. 2. SYN: death rate. 3. A fatal outcome. [L. mortalitas, fr. mors (mort-), death] perinatal m. (per′e-na-tal) m. around the time of birth, conventionally limited to the period from 28 weeks' gestation to 1 week postnatal.

mortar (mor′tar)
A vessel with rounded interior in which crude drugs and other substances are crushed or bruised by means of a pestle. [L. mortarium]

Mortierella (mor′te-e-rel′a)
A genus of saprophytic fungi (class Zygomycetes, family Mucoraceae) commonly found in nature; pathogenicity doubtful.

mortification (mor′ti-fi-ka′shun)
SYN: gangrene (1) . [L. mors (mort-), death, + facio, to make]

mortise (mor′tes)
The seating for the talus formed by the union of the distal fibula and the tibia at the ankle joint. [M.E., fr. O.Fr., fr. Ar. murtazz, fastened]

Dudley J., U.S. orthopedist, 1884–1960. See M. syndrome.

Samuel G., U.S. physician, 1799–1851. See M. plane.

Thomas G., U.S. physician, 1835–1903. See M. neuralgia, M. metatarsalgia.

mortuary (mor′tu-ar-e)
1. Relating to death or to burial. 2. SYN: morgue. [L. mortuus, dead, part. adj. fr. morior, pp. mortuus, to die]

morula (mor′oo-la, mor′u-)
The solid mass of blastomeres resulting from the early cleavage divisions of the zygote. In ova with little yolk, the m. is a spheroidal mass of cells; in forms with considerable yolk, the configuration of the m. stage is greatly modified. [Mod. L. dim. of L. morus, mulberry]

morulation (mor-oo-la′shun, mor-u-)
Formation of the morula.

moruloid (mor′oo-loyd, mor′u-)
1. Resembling a morula. 2. Shaped like a mulberry.

Augustin, French physician, 1819–1897. See M. chorea, M. disease.

mosaic (mo-za′ik)
1. Inlaid; resembling inlaid work. 2. The juxtaposition in an organism of genetically different tissues; it may occur normally (as in lyonization, q.v.), or pathologically, as an occasional phenomenon. From somatic mutation (gene mosaicism), an anomaly of chromosome division resulting in two or more types of cells containing different numbers of chromosomes (chromosome mosaicism), or chimerism (cellular mosaicism). [Mod. L. mosaicus, musaicus, pertaining to the Muses, artistic]

mosaicism (mo-za′i-sizm)
Condition of being mosaic (2). cellular m. a chimerism in which a tissue contains cells from different zygotes; e.g., in humans, involving erythrocytes. chromosome m. mosaic (2) . gene m. mosaic (2) . germinal m., gonadal m. a state in which some of the germ cells of the gonad are of a form not present in either parent, because of mutation in an intermediate progenitor of these cells.

Eli, U.S. physician, 1879–1964. See M. test.

moschus (mos′kus)
Musk. [G. moschos, musk]

Herman Otto, American physician, 1878–1954. See M. test.

Karl F., German physician, 1831–1911. See M. diabetes, M. sign.

mosquito, pl .mosquitoes (mus-ke′to, -tos)
A blood-sucking dipterous insect of the family Culicidae. Aedes, Anopheles, Culex, Mansonia, and Stegomyia are the genera containing most of the species involved in the transmission of protozoan and other disease-producing parasites. [Sp. dim. of mosca, fly, fr. L. musca, a fly]

Gerald, U.S. physician, 1931–1973. See M. tube.

Melvin L., U.S. oral pathologist, *1923. See Gorlin-Chaudhry-M. syndrome.

1. Any low growing, delicate cryptogamous plant of the class Musci. 2. Popularly, any one of a number of lichens and seaweeds. [A.S. meos] Ceylon m. a red seaweed; a source of agar. club m. SYN: lycopodium. Iceland m. SYN: cetraria. Irish m. SYN: chondrus (2) . muskeag m. SYN: sphagnum m.. pearl m. SYN: chondrus (2) . peat m. SYN: sphagnum m.. sphagnum m. a highly absorbent m. used as a substitute for absorbent cotton or gauze in surgical dressing and sanitary napkins. SYN: muskeag m., peat m..

Angelo, Italian physiologist, 1846–1910. See M. ergograph, M. sphygmomanometer.

Ernst, French ophthalmologist, 1845–1913. See M. operation.

mote (mot)
A small particle; a speck. [A.S. mot] blood motes SYN: hemoconia.


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