Copy of `mondofacto - Online Medical Dictionary`

The wordlist doesn't exist anymore, or, the website doesn't exist anymore. On this page you can find a copy of the original information. The information may have been taken offline because it is outdated.


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


metacarpectomy
<procedure> Excision of one or all of the metacarpals. ... Origin: metacarpus + G. Ektome, excision ... (05 Mar 2000) ...

metacarpohypothenar reflex
Flexion of the little finger on tapping the dorsum of the hand; seen in pyramidal tract lesions and is similar to Starling's reflex. ... (05 Mar 2000) ...

metacarpophalangeal
Relating to the metacarpus and the phalanges; denoting the articulations between them. ... (05 Mar 2000) ...

metacarpophalangeal articulations
Synonym for metacarpophalangeal joints ... The spheroid synovial joints between the heads of the metacarpals and the bases of the proximal phalanges. ... Synonym: articulationes metacarpophalangeae, metacarpophalangeal articulations, MP joints. ... (05 Mar 2000) ...

metacarpophalangeal joint
The articulation between a metacarpal bone and a phalanx. ... (12 Dec 1998) ...

metacarpophalangeal joints
The spheroid synovial joints between the heads of the metacarpals and the bases of the proximal phalanges. ... Synonym: articulationes metacarpophalangeae, metacarpophalangeal articulations, MP joints. ... (05 Mar 2000) ...

metacarpothenar reflex
Synonym for thumb reflex ... Flexion of the thumb upon tapping the dorsum of the hand. ... Synonym: metacarpothenar reflex. ... (05 Mar 2000) ...

metacentric
<genetics> Descriptive of a chromosome that has its centromere (kinetochore) at or near the middle of the chromosome, as opposed to acrocentric with the centromere near one end. ... (18 Nov 1997) ...

metacentric chromosome
A chromosome with a centrally placed centromere that divides the chromosome into two arms of approximately equal length. ... (05 Mar 2000) ...

metacercaria
The post-cercarial encysted stage in the life history of a fluke, prior to transfer to the definitive host. Some cercariae attach themselves to grass or other vegetation, form metacercaria, and later are ingested by herbivores, as in Fasciola and similar forms; others encyst in muscles of fish, as in Clonorchis, or in crayfish, as in Paragonimus.
metacestode
The larval stages of a tapeworm, including the metamorphosis of the oncosphere to the first evidence of sexuality in the adult worm, differentiation of the scolex, and beginning of proglottid formation; it includes the procercoid and plerocercoid stages of pseudophyllid cestodes, and the cysticercus, cysticercoid, coenurus, and hydatid stages of cy …

metachromasia
<pathology> The situation where a stain when applied to cells or tissues gives a colour different from that of the stain solution. ... (18 Nov 1997) ...

metachromatic
Denoting cells or dyes that exhibit metachromasia. ... Synonym: metachromophil, metachromophile. ... (05 Mar 2000) ...

metachromatic bodies
Concentrated deposits consisting primarily of polymetaphosphate and occurring in many bacteria as well as in algae, fungi, and protozoa; m. Body's differ in staining properties from the surrounding protoplasm. ... See: metachromasia. ... (05 Mar 2000) ...

metachromatic granules
Granule's that stain a colour different from that of the dye used. ... See: metachromasia. ... Term sometimes used as a synonym for volutin. ... (05 Mar 2000) ...

metachromatic leukodystrophy
<radiology> Dysmyelinating disease, autosomal recessive, aryl sulfatase A -- absent from urine and serum, most present by 2 yrs, die at 3-4 yrs, may arise at any age, CT: decreased density of white matter, primarily in centrum semiovale, with or without focal gall bladder defects (!) ... (12 Dec 1998) ...

metachromatic stain
<technique> A stain, such as methylene blue, thionin, or azure A, that has the ability to produce different colours with various histological or cytological structures. ... (05 Mar 2000) ...

metachromatism
1. Any colour change, whether natural or produced by basic aniline dyes. ... Synonym: metachromasia. ... Origin: meta-+ G. Chroma, colour ... (05 Mar 2000) ...

metachroming
The process of mixing a metal mordant with a dye before applying the dye to a tissue or fabric. ... (05 Mar 2000) ...

metachromophil
Metachromophile ... Synonym: metachromatic. ... Origin: meta-+ G. Chroma, colour, + philos, fond ... (05 Mar 2000) ...

metachronism
<cell biology> Type of synchrony found in the beating of cilia. A metachronal process is one that happens at a later time and the synchronisation is such that the active stroke of an adjacent cilium is slightly delayed so as to minimise the hydrodynamic interference, coordination is by visco mechanical coupling. Different patterns of metachro …

metachronous
Not synchronous; multiple separate occurrences, such as multiple primary cancers developing at intervals. ... Origin: meta-+ G. Chronos, time ... (05 Mar 2000) ...

metacone
The distobuccal cusp of an upper molar tooth. ... Origin: meta-+ G. Konos, cone ... (05 Mar 2000) ...

metaconid
The mesolingual cusp of a lower molar tooth. ... (05 Mar 2000) ...

metacontrast
Inhibition of the brightness of illumination when an adjacent visual field is illuminated. ... (05 Mar 2000) ...

metaconule
The distal intermediate cusp of an upper molar tooth. ... Origin: meta-+ G. Konos, a cone ... (05 Mar 2000) ...

metacresol
Synonym for m-cresol ... A local antiseptic with a higher germicidal power than phenol and less toxicity to tissues; used in disinfectants and fumigants; its acetate derivative is used as a topical antiseptic and fungicide. ... Synonym: metacresol. ... (05 Mar 2000) ...

metacryptozoite
The exoerythrocytic stage that develops from merozoites formed by the first, or cryptozoite, generation; the cryptozoite and metacryptozoite generations comprise the primary exoerythrocytic stages of malaria development (prepatent period) prior to infection of red blood cells. ... Origin: meta-+ G. Kryptos, hidden, + zoon, animal ... (05 Mar 2000) …

metacyesis
Synonym: ectopic pregnancy. ... Origin: meta-+ G. Kyesis, pregnancy ... (05 Mar 2000) ...

metadysentery
Old term for bacillary dysentery. ... (05 Mar 2000) ...

metafacial angle
The angle between the pterygoid processes and the base of the skull. ... Synonym: Serres' angle. ... (05 Mar 2000) ...

metafemale
<genetics> Human female in which there are four X chromosomes in addition to 44 autosomes. ... (18 Nov 1997) ...

metagenesis
1. <biology> The change of form which one animal species undergoes in a series of successively produced individuals, extending from the one developed from the ovum to the final perfected individual. Hence, metagenesis involves the production of sexual individuals by nonsexual means, either directly or through intervening sexless generations. …

metagon
<molecular biology> RNA particle found in Paramecium, where it behaves as mRNA and that can behave like a virus if ingested by the protozoan Didinium. ... (18 Nov 1997) ...

Metagonimus
A genus of flukes (superfamily Heterophypoidea) that encyst on fish and infect various fish-eating animals, including humans. Metagonimus yokogawai, an intestinal fluke widely distributed in the Far East and the Balkans and one of the smallest (1-2.5 mm) flukes infecting humans, is passed from Semisulcospira snails to cyprinoid fish and then to man …

metaherpetic keratitis
A postinfectious corneal inflammation in herpetic keratitis leading to epithelial erosion; not due to virus replication. ... (05 Mar 2000) ...

metahypophysial diabetes
Diabetes mellitus caused by large quantities of endogenous or exogenous pituitary growth hormone, term used to designate the irreversible phase of diabetes mellitus in acromegaly. ... (05 Mar 2000) ...

metaicteric
Occurring as a sequel of jaundice. ... Origin: meta-+ G. Ikterikos, jaundiced ... (05 Mar 2000) ...

metainfective
Occurring subsequent to an infection; denoting specifically a febrile condition sometimes observed during convalescence from an infectious disease. ... (05 Mar 2000) ...

metakinesis
Metakinesia ... Moving apart; the separation of the two chromatids of each chromosome and their movement to opposite poles in the anaphase of mitosis. ... Origin: meta-+ G. Kinesis, movement ... (05 Mar 2000) ...

metal
1. <chemistry> An elementary substance, as sodium, calcium, or copper, whose oxide or hydroxide has basic rather than acid properties, as contrasted with the nonmetals, or metalloids. No sharp line can be drawn between the metals and nonmetals, and certain elements partake of both acid and basic qualities, as chromium, manganese, bismuth, etc …

metal base
A metallic portion of a denture base forming a part of the wall of the basal surface of the denture; it serves as a base for the attachment of the plastic (resin) part of the denture and the teeth. ... (05 Mar 2000) ...

metal ceramic alloys
The fusion of ceramics (porcelain) to an alloy of two or more metals for use in restorative and prosthodontic dentistry. Examples of metal alloys employed include cobalt-chromium, gold-palladium, gold-platinum-palladium, and nickel-based alloys. ... (12 Dec 1998) ...

metal fume fever
Synonym for brass founder's fever ... An occupational disease, characterised by malaria-like symptoms, due to inhalation of particles and fumes of metallic oxides. Fumes are formed by evaporation at very high temperature and condensation in air into fine particles. ... Synonym: brass founder's ague, foundryman's fever, metal fume fever, zinc fume fev …

metal insert teeth
Prosthetic teeth containing metal cutting surfaces in the occlusal surfaces. ... (05 Mar 2000) ...

metal interface
In dentistry, a boundary between metal and nonsolvent solder, or between metal and surface oxide. ... (05 Mar 2000) ...

metallic
1. Of or pertaining to a metal; of the nature of metal; resembling metal; as, a metallic appearance; a metallic alloy. ... 2. <chemistry> Of, pertaining to, or characterised by, the essential and implied properties of a metal, as contrasted with a nonmetal or metalloid; basic; antacid; positive. Metallic iron, iron in the state of the metal, a …

metallic rale
A rale of metallic quality caused by resonance in a large cavity. ... (05 Mar 2000) ...

metallic tremor
A tremor caused by poisoning with metal. ... (05 Mar 2000) ...

metalline
<chemistry> Pertaining to, or resembling, a metal; metallic; as, metalline properties. ... Impregnated with metallic salts; chalybeate; as, metalline water. ... Origin: Cf. F. Metallin. ... <chemistry> A substance of variable composition, but resembling a soft, dark-coloured metal, used in the bearings of machines for obviating friction, a …

metallo-
Metal, metallic. ... Origin: see metal ... (05 Mar 2000) ...

metallocyanide
A compound of cyanogen with a metal forming an ionic radical that combines with a basic element to form a salt; e.g., potassium ferricyanide, K3Fe(CN)6. ... (05 Mar 2000) ...

metalloenzyme
<enzyme> An enzyme that contains a bound metal ion as part of its structure. The metal may be required for enzymic activity, either participating directly in catalysis or stabilising the active conformation of the protein. ... (18 Nov 1997) ...

metalloflavodehydrogenase
A type of oxidizing enzyme, containing one of the flavin nucleotides as coenzyme, plus a metal ion that is also necessary to the action; the metal may be Fe (as in succinate dehydrogenase), Cu (as in urate oxidase), or Mo (as in xanthine oxidase). ... (05 Mar 2000) ...

metalloflavoenzyme
<enzyme> An enzyme that contains one of the flavin nucleotides and at least one metal ion as a required part of its active structure. ... (05 Mar 2000) ...

metalloflavoprotein
A protein containing a flavin entity and at least one metal ion. ... (05 Mar 2000) ...

metallography
1. The science or art of metals and metal working; also, a treatise on metals. ... 2. A method of transferring impressions of the grain of wood to metallic surfaces by chemical action. ... 3. A substitute for lithography, in which metallic plates are used instead of stone. ... Origin: L. Metallum metal: cf. F. Metallographie. ... Source: Websters Dicti …

metalloid
Formerly, the metallic base of a fixed alkali, or alkaline earth; applied by Sir H. Davy to sodium, potassium, and some other metallic substances whose metallic character was supposed to be not well defined. ... Now, one of several elementary substances which in the free state are unlike metals, and whose compounds possess or produce acid, rather th …

metallophilia
Affinity for metal salts; e.g., the affinity of the cytoplasm of cells of the reticuloendothelial system for silver carbonate stain and salts of gold and iron. ... Origin: metallo-+ G. Philos, fond ... (05 Mar 2000) ...

metallophobia
<psychology> Morbid fear of metal objects. ... Origin: G. Metallon, metal, + phobos, fear ... (05 Mar 2000) ...

metalloporphyrin
A combination of a porphyrin with a metal, e.g., Fe (haematin), Mg (as in chlorophyll), Cu (in haemocyanin), Zn. ... (05 Mar 2000) ...

metalloporphyrins
Porphyrins which are combined with a metal ion. The metal is bound equally to all four nitrogen atoms of the pyrrole rings. They possess characteristic absorption spectra which can be utilised for identification or quantitative estimation of porphyrins and porphyrin-bound compounds. ... (12 Dec 1998) ...

metalloprotein
<protein> A protein that contains a bound metal ion as part of its structure. ... (18 Nov 1997) ...

metalloproteinases
<enzyme> Peptide hydrolases which use a metal in the catalytic mechanism. This group of enzymes is inactivated by metal chelators. ... Registry number: EC 3.4.24 ... (12 Dec 1998) ...

metalloproteins
Proteins that have one or more tightly bound metal ions forming part of their structure. ... (12 Dec 1998) ...

metalloscopy
Testing the action of various metals applied to the surface of the body. ... Origin: metallo-+ G. Skopeo, to examine ... (05 Mar 2000) ...

metallothionein
<biochemistry> Small cysteine rich metal binding protein found in the cytoplasm of many eukaryotes. Synthesis can be induced by heavy metals such as zinc, cadmium, copper and mercury and metallothioneins probably serve a protective function. Metallothionein gene promoters are used in studies of gene expression. ... (18 Nov 1997) ...

metallurgy
The science, art, or technology dealing with processes involved in the separation of metals from their ores, the technique of making or compounding the alloys, the techniques of working or heat-treating metals, and the mining of metals. It includes industrial metallurgy as well as metallurgical techniques employed in the preparation and working of …

metals
Electropositive chemical elements characterised by ductility, malleability, luster, and conductance of heat and electricity. They can replace the hydrogen of an acid and form bases with hydroxyl radicals. ... (12 Dec 1998) ...

metals, actinoid
A series of radioactive elements from actinium, atomic number 89, to and including lawrencium, atomic number 103. They are the theoretical analogs of the rare earth metal series. ... (12 Dec 1998) ...

metals, alkali
Metals that constitute group ia in the periodic table. They are the most strongly electropositive of the metals. ... (12 Dec 1998) ...

metals, alkaline earth
Metals that constitute the group IIa in the periodic table. ... (12 Dec 1998) ...

metals, heavy
metals with high specific gravity, typically larger than 5. They have complex spectra, form coloured salts and double salts, have a low electrode potential, are mainly amphoteric, yield weak bases and weak acids, and are oxidizing or reducing agents ... (12 Dec 1998) ...

metals, light
Metals with low specific gravity, typically smaller than 5, characterised by a single valence (1, 2, or 3), a simple spectrum, strong electromotive force (positive), and colourless compounds. ... (12 Dec 1998) ...

metals, rare earth
Elements of group IIIb of the periodic table from lanthanum, atomic number 57, to and including lutetium, atomic number 71. ... (12 Dec 1998) ...

metaluetic
Synonym: metasyphilitic. ... Synonym: metasyphilitic. ... Synonym: parasyphilitic. ... Origin: meta-+ L. Lues, pestilence ... (05 Mar 2000) ...

metamere
<biology> Unit of segmentation or metamerism. ... (18 Nov 1997) ...

metameric
1. <chemistry> Having the same elements united in the same proportion by weight, and with the same molecular weight, but possessing a different structure and different properties; as, methyl ether and ethyl alcohol are metameric compounds. See Isomeric. ... The existence of metameric compounds is due to the different arrangement of the same co …

metameric nervous system
That part of the nervous system which innervates body structures developed in ontogeny from the segmentally arranged somites or, in the head region, branchial arches. The term implies reference to the neural mechanisms intrinsic to the spinal cord and brainstem (represented by the sensory nuclei, motoneuronal cell groups, and their associated inter …

metamerism
<biology> The condition of developing body segments (such as in earthworms). ... (09 Oct 1997) ...

metamorphic
1. Subject to change; changeable; variable. ... 2. Causing a change of structure. ... 3. <geology> Pertaining to, produced by, or exhibiting, certain changes which minerals or rocks may have undergone since their original deposition; especially applied to the recrystallization which sedimentary rocks have undergone through the influence of heat …

metamorphopsia
Distortion of visual images. ... Origin: meta-+ G. Morphe, shape, + opsis, vision ... (05 Mar 2000) ...

metamorphosis
<cell biology> Change of body form, for example in the development of the adult frog from the tadpole or the butterfly from the caterpillar. ... (18 Nov 1997) ...

metamorphotic
Relating to or marked by metamorphosis. ... (05 Mar 2000) ...

metamyelocyte
A transitional form of myelocyte with nuclear construction that is intermediate between the mature myelocyte (myelocyte C of Sabin) and the two-lobed granular leukocyte. ... Synonym: juvenile cell. ... Origin: meta-+ G. Myelos, marrow, + kytos, cell ... (05 Mar 2000) ...

metanalysis
A statistical technique where all data from all available studies of something are combined, regardless of data quality. The technique is used by researchers to get a maximum of statistical information without worrying about distortion in the results. ... (09 Oct 1997) ...

metanephric
Of or pertaining to the metanephron. ... (05 Mar 2000) ...

metanephric blastema
Synonym for metanephric cap ... The concentrated mass of mesodermal cells about the metanephric bud in a young embryo; the cells of the cap form the uriniferous tubules of the permanent kidney. ... Synonym: metanephric blastema. ... (05 Mar 2000) ...

metanephric bud
The primordial cellular outgrowth from the mesonephric duct that gives rise to the epithelial lining of the ureter, of the pelvis, and calyces of the kidney, and of the straight collecting tubules. ... Synonym: ureteric bud. ... (05 Mar 2000) ...

metanephric cap
The concentrated mass of mesodermal cells about the metanephric bud in a young embryo; the cells of the cap form the uriniferous tubules of the permanent kidney. ... Synonym: metanephric blastema. ... (05 Mar 2000) ...

metanephric diverticulum
An outgrowth from the caudal portion of the mesonephric duct on either side, which grows cephalodorsally to make contact with the masses of metanephrogenous tissue (nephric blastemas) that give rise to the epithelial lining of the ureter and of the pelvis and the collecting ducts of the kidney. ... (05 Mar 2000) ...

metanephric duct
The slender tubular portion of the metanephric diverticulum; the primordium of the epithelial lining of the ureter. ... See: epoophoron, longitudinal duct of epoophoron. ... (05 Mar 2000) ...

metanephric tubule
An excretory unit of the metanephros or permanent kidney. ... (05 Mar 2000) ...

metanephrine
<chemical> Alpha-(methylaminomethyl)vanillyl alcohol. Product of epinephrine o-methylation. It is a commonly occurring, pharmacologically and physiologically inactive metabolite of epinephrine. ... Chemical name: Benzenemethanol, 4-hydroxy-3-methoxy-alpha-((methylamino)methyl)- ... (12 Dec 1998) ...

metanephrogenic
Applied to the more caudal part of the intermediate mesoderm which, under the inductive action of the metanephric diverticulum, has the potency to form metanephric tubules. ... Origin: meta-+ G. Nephros, kidney, + -gen, producing ... (05 Mar 2000) ...

metanephrogenic tissue
Tissue derived from the intermediate mesoderm caudal to mesonephric levels and concerned with the formation of the nephrons of the metanephros. ... (05 Mar 2000) ...

metaneutrophil
Not staining true with neutral dyes. ... Origin: meta-+ L. Neuter, neither, + G. Philos, fond ... (05 Mar 2000) ...

metanil yellow
A monoazo acid dye, C18H14N3O3SNa, used as a cytoplasmic and connective tissue stain. ... (05 Mar 2000) ...

metantimonic
<chemistry> Pertaining to, or designating, an acid (formerly called antimonic acid) analogous to metaphosphoric acid, and obtained as a white amorphous insoluble substance, (HSbO3). ... Formerly, designating an acid, which is now properly called pyroantimonic acid, and analogous to pyrophosphoric acid. ... Origin: Pref. Met- + antimonic. ... Sou …

metaphase
<cell biology> Classically the second phase of mitosis or one of the divisions of meiosis. In this phase the chromosomes are well condensed and aligned along the metaphase plate. ... (18 Nov 1997) ...