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mondofacto - Online Medical Dictionary
Category: Health and Medicine > Medical Dictionary
Date & country: 26/01/2008, UK
Words: 116197
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tetrabromophenolphthalein sodiumThe sodium salt of a brominated dye; it was used early in the development of cholecystography. ... (05 Mar 2000) ...
tetracaine<drug> Potent local anaesthetic. ... (18 Nov 1997) ...
tetracaine hydrochloride2-(Dimethylamino)ethyl p-(butylamino)benzoate monohydrochloride;a highly potent local anaesthetic used for spinal, nerve block, and topical anaesthesia. ... (05 Mar 2000) ...
tetracenomycin F1 monooxygenase<enzyme> Catalyses the oxidation of naphthacenone tcm f1 to the 5,12-naphthaquinone tcm d3 in the biosynthesis of tcm c in streptomyces glaucescens; requires only oxygen for enzymatic oxidation; inactivated by p-chloromercuribenzoic acid, n-ethylmaleimide and diethyl pyrocarbonate ... Registry number: EC 1.14.99.- ... Synonym: tcm f1 monooxygen …
tetracenomycin F2 cyclase<enzyme> Catalyses the cyclization of the anthrone tcmf2 to the naphthacenone tcmf1 in the biosynthesis of antibiotic tcm c in streptomyces glaucescens by an intramolecular aldol condensation-dehydration ... Registry number: EC 4.1.2.- ... Synonym: tcmi protein ... (26 Jun 1999) ...
tetrachirusA malformed individual having four hands. ... Origin: tetra-+ G. Cheir, hand ... (05 Mar 2000) ...
tetrachlorethyleneAn anthelmintic against hookworm and other nematodes. ... Synonym: carbon dichloride, ethylene tetrachloride, tetrachloroethylene. ... (05 Mar 2000) ...
tetrachlormethiazide6-chloro-3,4-dihydro-3-trichloromethyl-2H-1,2,4 -benzothiadiazine-7-sulfonamide 1,1-dioxide;a diuretic of the thiazide type. ... Synonym: teclothiazide. ... (05 Mar 2000) ...
tetrachlorodibenzodioxin<chemical> 2,3,7,8-tetrachlorodibenzo-p-dioxin. A contaminant of 2,4,5-t believed to have teratogenic effects. Synonym: tcdd. ... Chemical name: Dibenzo(b,e)(1,4)dioxin, 2,3,7,8-tetrachloro- ... (12 Dec 1998) ...
tetrachloroethaneCl2HC-CHCl2;acetylene tetrachloride; a nonflammable solvent for fats, oils, waxes, resins, etc.; used in the manufacture of paint and varnish removers, photographic films, lacquers, and insecticides. Its toxicity exceeds that of chloroform and carbon tetrachloride, and produces narcosis, liver damage, kidney damage, and gastroenteritis. ... Synonym: …
tetrachloroethene reductase<enzyme> Catalyses reduction of tetrachloroethene with concomitant release of chloride; a member of the menaquinone-dependent electron transport chain of dehalobacter restrictus ... Registry number: EC 1.3.99.- ... Synonym: pce reductase, tetrachloroethylene reductase ... (26 Jun 1999) ...
tetrachloroethylene<chemical> Ethylene tetrachloride. Used as grease solvent in industry; defats skin and mucus membranes, causes CNS, liver, and kidney damage on chronic exposure; used as anthelmintic for hookworms. ... Pharmacological action: antinematodal agent, solvents. ... Chemical name: Ethene, tetrachloro- ... (12 Dec 1998) ...
tetrachloromethaneSynonym for carbon tetrachloride ... <chemical> Tetrachloromethane. A solvent for oils, fats, lacquers, varnishes, rubber waxes, and resins, and a starting material in the manufacturing of organic compounds. Poisoning by inhalation, ingestion or skin absorption is possible and may be fatal. ... Chemical name: Methane, tetrachloro- ... (12 Dec 19 …
tetrachlorvinphos<chemical> 2-chloro-1-(2,4,5-trichlorophenyl)-vinyl dimethylphosphate. An organophosphate cholinesterase inhibitor that is used as an insecticide. It has low mammalian toxicity. ... Pharmacological action: cholinesterase inhibitor, insecticide, organophosphate. ... Chemical name: Phosphoric acid, 2-chloro-1-(2,4,5-trichlorophenyl)ethenyl dimeth …
tetracoccusA spherical bacterium that divides in two planes and characteristically forms groups of four cells. ... Origin: tetra-+ G. Kokkos, berry ... (05 Mar 2000) ...
tetracosactideSynonym for cosyntropin ... <chemical> Alpha(1-24)-corticotropin. A synthetic polypeptide with adrenocorticotropic activity. ... Chemical name: alpha1-24-Corticotropin ... (12 Dec 1998) ...
tetracroticDenoting a pulse curve with four upstrokes in the cycle. ... Origin: tetra-+ G. Krotos, a striking ... (05 Mar 2000) ...
tetracuspidHaving four cusps. ... Synonym: quadricuspid. ... (05 Mar 2000) ...
tetracycline<drug> Broad spectrum antibiotic that blocks binding of aminoacyl tRNA to the ribosomes of both gram-positive and gram-negative organisms (and those of organelles). Produced by Streptomyces aureofasciens. ... Other exaples include tetracycline, demeclocycline and doxycycline. ... (09 Oct 1997) ...
tetracycline 5a(11a)dehydrogenase<enzyme> Catalyses the oxidation of 7-chloro-5a(11a)-dehydrotetracycline to 7-chlorotetracycline; uses nadp ... Registry number: EC 1.3.1.- ... (26 Jun 1999) ...
tetracycline resistanceNonsusceptibility of a microbe (usually a bacterium) to the action of tetracycline, which binds to the 30s ribosomal subunit and prevents the normal binding of aminoacyl-tRNA. ... (12 Dec 1998) ...
tetracyclinesClosely congeneric derivatives of the polycyclic naphthacenecarboxamide. (gilman et al., goodman and gilman's the pharmacological basis of therapeutics, 8th ed, p1117) ... (12 Dec 1998) ...
tetradA group of four, four pollen grains remaining fused together at maturity. ... (09 Oct 1997) ...
tetradactylHaving only four fingers or toes on a hand or foot. ... Synonym: quadridigitate. ... Origin: tetra-+ G. Daktylos, finger or toe ... (05 Mar 2000) ...
tetradecanoic acidSynonym for myristic acid ... <biochemistry> The myristoyl group is one of the less common fatty acyl residues of phospholipids in biological membranes but is found as an N terminal modification of a large number of membrane associated proteins and some cytoplasmic proteins. ... It is a common modification of viral proteins. In all known exampl …
tetradecanoylphorbol acetate<chemical> A phorbol ester found in croton oil with very effective tumour promoting activity. It stimulates the synthesis of both DNA and RNA. ... Pharmacological action: carcinogens. ... Chemical name: Tetradecanoic acid, 9a-(acetyloxy)-1a,1b,4,4a,5,7a,7b,8,9,9a-decahydro-4a,7b-dihydroxy-3-(hydroxymethyl)-1,1,6,8-tetramethyl-5-oxo-1H-cycloprop …
tetradynamousOf an androecium, consisting of four stamens of the same length and two of a different length. ... (09 Oct 1997) ...
tetraethyl poisoningSynonym for tetraethyllead ... Pb(C2H5)4; tetraethylplumbane;an anti-knock compound added to motor fuel; has a toxic action causing anorexia, nausea, vomiting, diarrhoea, tremors, muscular weakness, insomnia, irritability, nervousness, and anxiety; death may occur. ... Synonym: lead tetraethyl. ... (05 Mar 2000) ...
tetraethyl pyrophosphateEt4P2O7; [(EtO)2PO]2O;an organic phosphoric compound used as an insecticide; a potent irreversible cholinesterase inhibitor. ... Acronym: TEPP ... (05 Mar 2000) ...
tetraethylammoniumA potassium-selective ion channel blocker. ... (12 Dec 1998) ...
tetraethylammonium chloride(C2H5)4N+C l-;a quaternary ammonium compound that partially blocks transmission of impulses through parasympathetic and sympathetic ganglia; its clinical usefulness is limited; formerly used as an antihypertensive drug. ... (05 Mar 2000) ...
tetraethylammonium ionA monovalent cation widely used in neurophysiology as a specific blocker of potassium channels. It is similar in size to the hydrated potassium ion and gets stuck (reversibly) in the channels. ... (18 Nov 1997) ...
tetraethylleadPb(C2H5)4; tetraethylplumbane;an anti-knock compound added to motor fuel; has a toxic action causing anorexia, nausea, vomiting, diarrhoea, tremors, muscular weakness, insomnia, irritability, nervousness, and anxiety; death may occur. ... Synonym: lead tetraethyl. ... (05 Mar 2000) ...
tetraethylmonothionopyrophosphateAn anticholinesterase agent used in the treatment of glaucoma. ... (05 Mar 2000) ...
tetraethylthiuram disulfideSynonym for disulfiram ... <chemical> A carbamate derivative used as an alcohol deterrent. It is a relatively nontoxic substance when administered alone, but markedly alters the intermediary metabolism of alcohol. When alcohol is ingested after administration of disulfiram, blood acetaldehyde concentrations are increased, followed by flushing, …
tetragastrin<chemical> L-tryptophyl-l-methionyl-l-aspartyl-l-phenylalaninamide. The c-terminal tetrapeptide of gastrin. It is the smallest peptide fragment of gastrin which has the same physiological and pharmacological activity as gastrin. ... Chemical name: L-Phenylalaninamide, L-tryptophyl-L-methionyl-L-alpha-aspartyl- ... (12 Dec 1998) ...
tetraglycine hydroperiodide(NH2CH2COOH)4HI-11/4I2;dissolves in water to the extent of 380 g per liter; used for the emergency disinfection of drinking water in amounts to yield 8 p.p.m. Of active iodine. ... (05 Mar 2000) ...
tetragon1. <geometry> A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc. ... 2. <astronomy> An aspect of two planets with regard to the earth when they are distant from each other ninety degrees, or the fourth of a circle. ... Origin: L. Tetragonum, Gr.; (see Tetra-) + corner, angle: cf. F. Tetragone. ... Sourc …
tetragonal1. <geometry> Of or pertaining to a tetragon; having four angles or sides; thus, the square, the parallelogram, the rhombus, and the trapezium are tetragonal fingers. ... 2. <botany> Having four prominent longitudinal angles. ... 3. <chemistry> Designating, or belonging to, a certain system of crystallization; dimetric. See Tetragon …
tetragonusAn obsolete term for platysma muscle. ... (05 Mar 2000) ...
tetrahedral1. Having, or composed of, four sides. ... 2. <chemistry> Having the form of the regular tetrahedron. Pertaining or related to a tetrahedron, or to the system of hemihedral forms to which the tetrahedron belongs. ... <geometry> Tetrahedral angle, a solid angle bounded or inclosed by four plane angles. ... See: Tetrahedron. ... Source: Webst …
tetrahedrite<chemical> A sulphide of antimony and copper, with small quantities of other metals. It is a very common ore of copper, and some varieties yield a considerable presentage of silver. ... Synonym: gray copper ore, fahlore, and panabase. ... Origin: So called because the crystals of the species are commonly tetrahedrons. ... Source: Websters Dictio …
tetrahedron<geometry> A solid figure inclosed or bounded by four triangles. ... In crystallography, the regular tetrahedron is regarded as the hemihedral form of the regular octahedron. ... <geometry> Regular tetrahedron, a solid bounded by four equal equilateral triangles; one of the five regular solids. ... Origin: Tetra- + Gr. Seat, base, fr. To s …
tetrahydricDenoting a compound containing four ionizable hydrogen atoms (four acid groups). ... (05 Mar 2000) ...
tetrahydro-<prefix> Prefix denoting attachment of four hydrogen atoms; e.g., tetrahydrofolate, H4folate. ... (05 Mar 2000) ...
tetrahydrocannabinol<chemical> The delta(1)-3,4-trans-isomer (also referred to as the delta(9)-isomer) is the major pharmacologically active constituent of cannabis sativa l. (marihuana, hashish). Dronabinol, a synthetic form of tetrahydrocannabinol, is used to treat the wasting condition associated with aids and also cancer patients undergoing chemotherapy. ... …
tetrahydrocannibanol<chemical> This is the primary intoxicant in marijuana, Cannabis sativa. It is marketed as Marinol and can be legally prescribed to treat nausea associated with chemotherapy and radiation treatment. It has also proven useful in treating glaucoma. ... (09 Oct 1997) ...
tetrahydrocortisol<chemical> Chemical name: Pregnan-20-one, 3,11,17,21-tetrahydroxy-, (3alpha,5beta,11beta)- ... (12 Dec 1998) ...
tetrahydrocortisone<chemical> Chemical name: Pregnane-11,20-dione, 3,17,21-trihydroxy-, (3alpha,5beta)- ... (12 Dec 1998) ...
tetrahydrofolate dehydrogenase<enzyme> An enzyme of the oxidoreductase class that catalyses the reaction 7,8-dihyrofolate and NADPH to yield 5,6,7,8-tetrahydrofolate and NADPH+, producing reduced folate for amino acid metabolism, purine ring synthesis, and the formation of deoxythymidine monophosphate. Methotrexate and other folic acid antagonists used as chemotherapeutic …
tetrahydrofolate methyltransferaseSynonym for methionine synthase ... Tetrahydropteroylglutamate methyltransferase; methionine-homocysteine methyltransferase;an enzyme that catalyses the reaction of N5-methyltetrahydrofolate with l-homocysteine to form tetrahydrofolate and l-methionine; a cobalamin-requiring enzyme; a deficiency of this enzyme results in an accumulation of l-homocys …
tetrahydrofolic acidThe active coenzyme form of folic acid; participates in one-carbon metabolism. ... Synonym: coenzyme F. ... (05 Mar 2000) ...
tetrahydronaphthalenesPartially saturated 1,2,3,4-tetrahydronaphthalene compounds. ... (12 Dec 1998) ...
tetrahydropapaveroline<chemical> 1-(3,4-dihydroxybenzyl)-1,2,3,4-tetrahydro-6,7-isoquinolinediol. A leukomaine (animal alkaloid) formed in brain and liver from dopamine and l-dopa; it may be implicated in psychiatric problems. ... Chemical name: 6,7-Isoquinolinediol, 1-((3,4-dihydroxyphenyl)methyl)-1,2,3,4-tetrahydro- ... (12 Dec 1998) ...
tetrahydroprotoberberine oxidase<enzyme> From berberis wilsoniae; catalyses in the presence of oxygen the removal of four hydrogen atoms from the c ring of tetrahydroprotoberberines with production of 4 mol of h2o2 and h2o ... Registry number: EC 1.3.3.- ... Synonym: thpb oxidase, tetrahydroberberine oxidase ... (26 Jun 1999) ...
tetrahydrouridine<chemical> 1-(beta-d-ribofuranosyl)-4-hydroxy-3,4,5-tetrahydro-pyrimidin-2(1h)-one. An inhibitor of nucleotide metabolism. ... Pharmacological action: antimetabolites. ... Chemical name: 2(1H)-Pyrimidinone, tetrahydro-4-hydroxy-1-beta-D-ribofuranosyl- ... (12 Dec 1998) ...
tetrahydroxynaphthalene reductase<enzyme> Catalyses the NADPH-dependent reduction of 1,3,6,8-tetrahydroxynaphthalene into scytalone and 1,3,8-trihydroxynaphthalene into vermelone; genbank l22309 ... Registry number: EC 1.3.1.50 ... Synonym: t4hn reductase, scytalone-nadp(+) delta(5)-oxidoreductase, NADPH-dependent tetrahydroxynaphthalene reductase, polyhydroxynaphthalene reduc …
tetrahydrozoline hydrochlorideA sympathomimetic agent related to ephedrine, used as a topical nasal and conjunctival decongestant; excessive amounts may convert an acute congestion into a chronic reactive hyperaemia. ... (05 Mar 2000) ...
TetrahymenaGenus of ciliate protozoa frequently used in studies on ciliary axonemes, self splicing RNA and telomere replication. ... (18 Nov 1997) ...
tetrahymena pyriformisA species of ciliate protozoa used extensively in genetic research. ... (12 Dec 1998) ...
tetrahymena thermophilaA species of ciliate protozoa used in genetic and cytological research. ... (12 Dec 1998) ...
tetrahymeninaA suborder of ciliate protozoa. most organisms are free-living in fresh water and many species are used extensively for experimental studies. ... (12 Dec 1998) ...
tetraiodophenolphthalein sodiumSynonym for iodophthalein ... A radiographic contrast medium. The disodium salt was once used in radiography of the gallbladder. ... Synonym: tetraiodophenolphthalein sodium. ... (05 Mar 2000) ...
tetraisopropylpyrophosphamide<chemical> N,n',n'',n'''-tetraisopropylpyrophosphamide. A specific inhibitor of pseudocholinesterases. It is commonly used experimentally to determine whether pseudo- or acetylcholinesterases are involved in an enzymatic process. ... Pharmacological action: cholinesterase inhibitor. ... Chemical name: Diphosphoramide, N,N',N'',N'''-tetrakis(1-m …
tetralogySynonym: tetrad. ... Origin: G. Tetralogia ... (05 Mar 2000) ...
tetralogy of fallotA congenital heart anomaly which consists of pulmonary stenosis, ventricular septal defect, dextroposition of the aorta (aorta is on the right side instead of the left) and hypertrophy of the right ventricle. This condition results in a blue baby at birth due to inadequate oxygenation. Surgical correction is emergent. ... (27 Sep 1997) ...
tetralysine endopeptidase<enzyme> E coli enzyme cleaves tetralysine into 2 dilysine ... Registry number: EC 3.4.99.- ... (26 Jun 1999) ...
tetramastiaPresence of four breasts on an individual. ... Origin: tetra-+ G. Mastos, breast ... (05 Mar 2000) ...
tetramastigoteA protozoan or other microorganism possessing four flagella. ... Origin: tetra-+ G. Mastix, whip ... (05 Mar 2000) ...
tetramastousHaving four breasts. ... (05 Mar 2000) ...
tetramelusConjoined twins possessing four arms (tetrabrachius), or four legs (tetrascelus). ... See: conjoined twins. ... Origin: tetra-+ G. Melos, limb ... (05 Mar 2000) ...
TetrameresA genus of stomach-infecting parasitic nematodes (family Spiruridae) of birds. When filled with eggs, the female worm is enormously enlarged and has a globular, blood-red appearance. Species include Tetrameres americana, found in the proventriculus of chickens (sometimes severely pathogenic in young chicks), turkeys, grouse, and quail, and transmit …
tetramericTetramerous ... Having four parts, or parts arranged in groups of four, or capable of existing in four forms. ... Origin: tetra-+ G. Meros, part ... (05 Mar 2000) ...
tetramerousOf a flower, having four segments in each perianth whorl, and usually in each whorl of stamens also. ... (09 Oct 1997) ...
tetramethyl acridineSynonym for acridine orange ... <chemical, molecular biology> 3, 6-bis(dimethylamino)acridinium chloride. ... A toxic, fluorescing dye that stains DNA and RNA and is typically used to identify cancerous tumour cells. When it binds to double-stranded DNA, it fluoresces green, when it binds with the phosphate groups of single-stranded DNA or RNA, …
tetramethylammonium iodide(CH3)4NI3;dissolves in water to the extent of 0.25 gm per liter; used for the emergency disinfection of drinking water. ... (05 Mar 2000) ...
tetramethyldiarsineSynonym for cacodyl ... (CH3)2As-As(CH3)2;an oil resulting from the distillation together of arsenous acid and potassium acetate. ... Synonym: dicacodyl, tetramethyldiarsine. ... Origin: G. Kakodes, foul-smelling ... (05 Mar 2000) ...
tetramethylphenylenediamine<chemical> N,n,n',n'-tetramethyl-p-phenylenediamine. Used in the form of the hydrochloride as a reagent in analytical chemistry. ... Pharmacological action: indicators and reagents. ... Chemical name: Benzenediamine, N,N,N',N'-tetramethyl- ... (12 Dec 1998) ...
tetramethylputrescineA derivative of putrescine, C8H20N2, similar in its action to muscarine. ... (05 Mar 2000) ...
tetramisole<chemical> Chemical name: Imidazo(2,1-b)thiazole, 2,3,5,6-tetrahydro-6-phenyl-, (+-)- ... (12 Dec 1998) ...
tetranitrolSynonym for erythrityl tetranitrate ... <chemical> A vasodilator with general properties similar to nitroglycerin. ... Pharmacological action: vasodilator agents. ... Chemical name: 1,2,3,4-Butanetetrol, tetranitrate, (R*,S*)- ... (12 Dec 1998) ...
tetranitromethane<chemical> Corrosive oxidant, explosive; additive to diesel and rocket fuels; causes skin and lung irritation; proposed war gas. A useful reagent for studying the modification of specific amino acids, particularly tyrosine residues in proteins. Has also been used for studying carbanion formation and for detecting the presence of double bonds …
tetranucleotideA compound of four nucleotides; once thought to represent the actual structure of nucleic acid (tetranucleotide theory). ... (05 Mar 2000) ...
tetraotusSynonym for tetrotus ... A malformed individual with four ears, four eyes, two faces, and two almost separate heads. ... Synonym: tetraotus. ... Origin: tetra-+ G. Ous (ot-), ear ... (05 Mar 2000) ...
tetraparesisWeakness of all four extremities. ... Synonym: quadriparesis. ... (05 Mar 2000) ...
tetrapeptideA compound of four amino acids in peptide linkage. ... (05 Mar 2000) ...
tetraperomeliaPeromelia involving all four extremities. ... Origin: tetra-+ G. Peros, maimed, + melos, limb ... (05 Mar 2000) ...
tetraphenylborate<chemical> Tetraphenylborate(1-). An anionic compound that is used as a reagent for determination of potassium, ammonium, rubidium, and cesium ions. It also uncouples oxidative phosphorylation and forms complexes with biological materials, and is used in biological assays. ... Pharmacological action: indicators and reagents, uncoupling agents. …
tetraphocomeliaPhocomelia involving all four limbs. ... (05 Mar 2000) ...
tetraplegiaSynonym: quadriplegia. ... Origin: tetra-+ G. Plege, stroke ... (05 Mar 2000) ...
tetraplegicSynonym for quadriplegic ... Pertaining to or afflicted with quadriplegia. ... Synonym: tetraplegic. ... (05 Mar 2000) ...
tetraploidNucleus, cell or organism that has four copies of the normal haploid chromosome set. ... (18 Nov 1997) ...
tetrapusA malformed individual with four feet. ... Origin: G. Tetrapous, fr. Tetra-+ pous, foot ... (05 Mar 2000) ...
tetrapyrroleA molecule containing four pyrrole nuclei; e.g., porphyrin. ... (05 Mar 2000) ...
tetrasaccharideA sugar containing four molecules of a monosaccharide; e.g., stachyose. ... (05 Mar 2000) ...
tetrascelusA malformed individual with four legs. ... Origin: tetra-+ G. Skelos, leg ... (05 Mar 2000) ...
tetrasomicRelating to a cell nucleus in which one chromosome is represented four times while all others are present in the normal number. ... Origin: tetra-+ chromosome ... (05 Mar 2000) ...
tetrasterA figure exceptionally and abnormally occurring in mitosis, in which there are four asters. ... Origin: tetra-+G. Aster, star ... (05 Mar 2000) ...
tetrastichiasisDuplication of the growth of the eyelashes (in four rows). ... Origin: tetra-+ G. Stichos, row ... (05 Mar 2000) ...
tetraterpenesHydrocarbons or their derivatives formed by the condensation of eight isoprene units (i.e., four terpenes) and therefore containing 40 carbon atoms; e.g., various carotenoids. ... (05 Mar 2000) ...
