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


terminal sulcus
Synonym for sulcus terminalis ... Sulcus terminalis linguae; a V-shaped groove, with apex pointing backward, on the surface of the tongue, marking the separation between the oral, or horizontal, and the pharyngeal, or vertical, parts, sulcus terminalis atrii dextri; a groove on the surface of the right atrium of the heart, marking the junction of th …

terminal thread
Synonym for terminal filum ... A long, slender connective tissue (pia mater) strand extending from the extremity of the medullary cone to the internal aspect of the spinal dural sac (filum terminale internum); stout strands of connective tissue attaching the spinal dural sac to the coccyx (filum terminale externum), commonly called the coccygeal lig …

terminal transferase
<enzyme> An enzyme adds a particular nucleotide to the 3' end of DNAstrands. ... (09 Oct 1997) ...

terminal transferases
Enzymes that covalently add nucleotides to the 3' end of polynucleic acids; e.g., DNA nucleotidylexotransferase. ... (05 Mar 2000) ...

terminal vein
Synonym for superior thalamostriate vein ... <anatomy, vein> A long vein passing forward in the groove between the thalamus and caudate nucleus, covered by the lamina affixa, receiving the transverse caudate veins along its lateral side, and joining at the caudal wall of Monro's foramen with the choroidal vein and vein of septum pellucidum to …

terminal ventricle
A dilation of the central canal of the spinal cord at the tip of the medullary cone. ... Synonym: ventriculus terminalis. ... (05 Mar 2000) ...

terminal web
<cell biology> The cytoplasmic region at the base of microvilli in intestinal epithelial cells, a region rich in microfilaments from the microvillar core and from adherens junctions, in myosin and in other proteins characteristic of an actomyosin motor system. ... (13 Jan 1998) ...

terminally ill
Persons with an incurable or irreversible illness at the end stage that will result in death within a short time. ... (12 Dec 1998) ...

terminase
<enzyme> Involved in assembly of lambda phage; cleaves vegetative concotemeric DNA to generate unit lambda chromosomes; terl encodes large subunit; ters encodes small subunit ... Registry number: EC 3.1.- ... Synonym: lambda DNA terminase, terl gene product, ters gene product ... (26 Jun 1999) ...

terminatio
Synonym: termination. ... See: ending. ... Origin: L. ... (05 Mar 2000) ...

termination
<molecular biology> Stop of mRNA synthesis (i.e., transcription) at the terminator site ... Top of protein synthesis (i.e., translation) at the stop codon. ... (09 Oct 1997) ...

termination codon
<molecular biology> The three codons, UAA known as ochre, UAG as amber and UGA as opal, that do not code for an amino acid but act as signals for the termination of protein synthesis. ... They are not represented by any tRNA and termination is catalysed by protein release factors. There are two release factors in E. Coli, RF1 recognises UAA an …

termination factor
<molecular biology> Any of several proteins in the cytosol that cut a completed polypeptide loose from a ribosome. ... (13 Jan 1998) ...

termination region
<molecular biology> A DNA sequence that signals the end of transcription. ... (13 Jan 1998) ...

termination sequence
Synonym for termination codon ... <molecular biology> The three codons, UAA known as ochre, UAG as amber and UGA as opal, that do not code for an amino acid but act as signals for the termination of protein synthesis. ... They are not represented by any tRNA and termination is catalysed by protein release factors. There are two release factors …

terminationes
Plural of terminatio. ... Origin: L. ... (05 Mar 2000) ...

terminationes nervorum liberae
Synonym for free nerve endings ... A form of peripheral ending of sensory nerve fibres in which the terminal filaments end freely in the tissue. ... Synonym: terminationes nervorum liberae. ... (05 Mar 2000) ...

terminator
<molecular biology> DNA sequence at the end of a transcription unit that causes RNA polymerase to stop transcription. ... (13 Jan 1998) ...

terminator regions (genetics)
DNA sequences which signal the termination of transcription. ... (12 Dec 1998) ...

termini generales
General terms; words that are of general use in descriptive anatomy. ... (05 Mar 2000) ...

termino-terminal anastomosis
An operation by which the central end of an artery is connected with the peripheral end of the corresponding vein, and the peripheral end of the artery with the central end of the vein. ... (05 Mar 2000) ...

terminology
1. <study> The doctrine of terms; a theory of terms or appellations; a treatise on terms. ... 2. The terms actually used in any business, art, science, or the like; nomenclature; technical terms; as, the terminology of chemistry. 'The barbarous effect produced by a German structure of sentence, and a terminology altogether new.' (De Quincey)
terminus
Origin: L. See Term. ... 1. Literally, a boundary; a border; a limit. ... 2. The Roman divinity who presided over boundaries, whose statue was properly a short pillar terminating in the bust of a man, woman, satyr, or the like, but often merely a post or stone stuck in the ground on a boundary line. ... 3. Hence, any post or stone marking a boundary; …

termite
Origin: F. See Termes. ... <zoology> Any one of numerous species of pseudoneoropterous insects belonging to Termes and allied genera; called also white ant. ... They are very abundant in tropical countries, and are noted for their destructive habits, their large nests, their remarkable social instincts, and their division of labour among the po …

termolecular
Denoting three molecules; e.g., a termolecular reaction requires three molecules to come together in order for the reaction to occur. ... Origin: L. Ter, thrice, + molecular ... (05 Mar 2000) ...

termone
A type of ectohormone, secreted by some invertebrate organisms, that stimulates gametogenesis. ... Origin: L. Ter, thrice, threefold, + hormone ... (05 Mar 2000) ...

tern
<ornithology> Any one of numerous species of long-winged aquatic birds, allied to the gulls, and belonging to Sterna and various allied genera. ... Terns differ from gulls chiefly in their graceful form, in their weaker and more slender bills and feet, and their longer and more pointed wings. The tail is usually forked. most of the species are …

ternary
1. Proceeding by threes; consisting of three; as, the ternary number was anciently esteemed a symbol of perfection, and held in great veneration. ... 2. <chemistry> Containing, or consisting of, three different parts, as elements, atoms, groups, or radicals, which are regarded as having different functions or relations in the molecule; thus, s …

ternary complex
Term used to describe the tripartite combination of, for example, enzyme-cofactor-substrate or enzyme-substrate1-substrate2 for a multisubstrate enzyme, the active form involved in many enzyme-catalyzed reactions. ... (05 Mar 2000) ...

ternate
,plant biology> In groups of three, of leaves, arranged in whorls of three, of a single leaf, having the leaflets arranged in groups of three. ... (13 Jan 1998) ...

terpene
<plant biology> Lipid species, very abundant in plants. In principle terpenes are polymers of isoprene units. ... Function in plants is not clear. In animals dolichol, an important carrier species in the formation of glycoproteins, is a terpenoid. Similarly, squalene, an intermediate in the synthesis of cholesterol is a terpene. ... (13 Jan 199 …

terpene carbocyclase
<enzyme> Involved in formation of cyclic monoterpenes from geranyl and neryl pyrophosphate; mechanism may be intramolecular analog of prenyltransferase ... Registry number: EC 2.5.1.- ... Synonym: carbocyclase ... (26 Jun 1999) ...

terpene synthase
<enzyme> Acts on dimethylallyl pyrophosphate (pp), geranyl pp, farnesyl pp and geranylgeranyl pp to generate a wide range of terpenoids; genbank y11188 ... Registry number: EC 2.5.1.- ... Synonym: ts1 protein, plant, atts1 gene product, ... (26 Jun 1999) ...

terpenyl monophosphate hydrolase
<enzyme> Hydrolyzes bornyl phosphate to borneol ... Registry number: EC 3.1.3.- ... (26 Jun 1999) ...

terpenyl pyrophosphate hydrolase
<enzyme> Hydrolyzes bornyl pyrophosphate to bornyl phosphate ... Registry number: EC 3.6.1.- ... (26 Jun 1999) ...

terphenyl compounds
Compounds consisting of benzene rings linked to each other in either ortho, meta or para positions. Permitted are any substitutions, but ring fusion to any of the benzene rings is not allowed. ... (12 Dec 1998) ...

terpineol
P-Menth-1-en-8-ol;an unsaturated alcoholic terpene obtained by heating terpin hydrate with diluted phosphoric acid; an active antiseptic and a perfume. ... (05 Mar 2000) ...

terra japonica
Synonym for gambir ... An extract from the leaves of Uncaria (Ourouparia) gambier (family Rubiaceae); an astringent. Commercial gambir is known as terra japonica. ... (05 Mar 2000) ...

terrace
1. A raised level space, shelf, or platform of earth, supported on one or more sides by a wall, a bank of tuft, or the like, whether designed for use or pleasure. ... 2. A balcony, especially a large and uncovered one. ... 3. A flat roof to a house; as, the buildings of the Oriental nations are covered with terraces. ... 4. A street, or a row of house …

terrapin
<zoology> Any one of numerous species of tortoises living in fresh and brackish waters. Many of them are valued for food. ... Alternative forms: terapin, terrapen, terrapene, and turapen. ... The yellow-bellied terrapin (Pseudemys acebra) of the Southern United States, the red-bellied terrapin (Pseudemys rugosa), native of the tributaries Chesa …

terrestrial
<ecology> Of or on the ground, of the habitat of a plant, on land as opposed to in water, or on the ground as opposed to on another plant. ... (13 Jan 1998) ...

Terrey, Mary
<person> 20th century U.S. Physician. ... See: Lowe-Terrey-MacLachlan syndrome. ... (05 Mar 2000) ...

Terrien, Louis-Felix
<person> French surgeon, 1837-1908. ... See: Terrien's valve, Terrien's marginal degeneration. ... (05 Mar 2000) ...

Terrien's marginal degeneration
A form of marginal corneal degeneration. ... (05 Mar 2000) ...

Terrien's valve
A valvelike fold between the gallbladder and the cystic duct; the first ridge of the spiral fold of the cystic duct. ... (05 Mar 2000) ...

terrier
1. [F. Terrier, chien terrier, from terre the earth, L. Terra; cf. F. Terrier a burrow, LL. Terrarium a hillock (hence the sense, a mound thrown up in making a burrow, a burrow). See Terrace, and cf. Terrier, 2. ... <zoology> One of a breed of small dogs, which includes several distinct subbreeds, some of which, such as the Skye terrier and Yo …

territorial matrix
Synonym for cartilage capsule ... The more intensely basophilic matrix in hyaline cartilage surrounding the lacunae in which the cartilage cells lie. ... Synonym: territorial matrix. ... (05 Mar 2000) ...

territoriality
Behaviour in defense of an area against another individual or individuals primarily of the same species. ... (12 Dec 1998) ...

terry thomas sign
<radiology> A gap between the scaphoid and the lunate bones suggesting a rupture of the scapho-lunate ligament ... (12 Dec 1998) ...

Terry, Theodore
<person> U.S. Ophthalmologist, 1899-1946. ... See: Terry's syndrome. ... (05 Mar 2000) ...

Terry's nails
A white, ground-glass-like opacity of the nail's with a zone of normal pink at the distal edge of the nail's; associated with liver disease (most commonly, cirrhosis of the liver). ... (05 Mar 2000) ...

Terry's syndrome
Synonym for retinopathy of prematurity ... <ophthalmology, paediatrics> A bilateral retinopathy occurring in premature infants treated with excessively high concentrations of oxygen, characterised by vascular dilatation, proliferation, and tortuosity, oedema, and retinal detachment, with ultimate conversion of the retina into a fibrous mass th …

tersanctus
An ancient ascription of praise (containing the word 'Holy' in its Latin form, 'Sanctus' thrice repeated), used in the Mass of the Roman Catholic Church and before the prayer of consecration in the communion service of the Church of England and the Protestant Episcopal Church. Cf. Trisagion. ... Origin: L. Ter thrice + sanctus holy. ... Source: Webst …

Terson, Albert
<person> French ophthalmologist, 1867-1935. ... See: Terson's glands. ... (05 Mar 2000) ...

Terson's glands
Synonym for conjunctival glands ... Clusters of mucous cells in the conjunctival epithelium, most numerous on the bulbar conjunctiva. ... Synonym: glandulae conjunctivales, Terson's glands. ... (05 Mar 2000) ...

tert-butyl alcohol
<chemical> Pharmacological action: carcinogens. ... (12 Dec 1998) ...

tert-butyloxycarbonyl
Synonym for t-butoxycarbonyl ... (CH3)3COCO-;an amino-protecting group used in peptide synthesis. ... Synonym: tert-butyloxycarbonyl. ... (05 Mar 2000) ...

tertian
<medicine> Occurring every third day; as, a tertian fever. ... Origin: L. Tertianus, from tertius the third. See Tierce. ... 1. <medicine> A disease, especially an intermittent fever, which returns every third day, reckoning inclusively, or in which the intermission lasts one day. ... 2. A liquid measure formerly used for wine, equal to se …

tertian fever
Synonym for vivax malaria ... <disease, microbiology> A type of malaria caused by the protozoan Plasmodium vivax, it isthe most common form of the disease, is rarely fatal but is the most difficult to cure, and is characterised by fevers that typically occur every other day. ... (11 Nov 1997) ...

tertian malaria
Synonym for vivax malaria ... <disease, microbiology> A type of malaria caused by the protozoan Plasmodium vivax, it isthe most common form of the disease, is rarely fatal but is the most difficult to cure, and is characterised by fevers that typically occur every other day. ... (11 Nov 1997) ...

tertian parasite
Synonym for plasmodium vivax ... A protozoan parasite that causes vivax malaria (malaria, vivax). This species is found almost everywhere malaria is endemic and is the only one that has a range extending into the temperate regions. ... (12 Dec 1998) ...

tertiarism
All the symptoms of the tertiary stage of syphilis taken collectively. ... (05 Mar 2000) ...

tertiary
1. Being of the third formation, order, or rank; third; as, a tertiary use of a word. ... 2. <chemistry> Possessing some quality in the third degree; having been subjected to the substitution of three atoms or radicals; as, a tertiary alcohol, amine, or salt. Cf. Primary, and Secondary. ... 3. <geology> Later than, or subsequent to, the S …

tertiary alcohol
An alcohol characterised by the trivalent atom group ... (05 Mar 2000) ...

tertiary amine monooxygenase
<enzyme> Requires NADPH and fad; can be separated from dimethylamine mono-oxygenase; oxidises a variety of tertiary alkylamines up to tributylamine ... Registry number: EC 1.14.99.- ... Synonym: trimethylamine mono-oxygenase ... (26 Jun 1999) ...

tertiary amputation
An amputation formerly performed after infection had been controlled. ... (05 Mar 2000) ...

tertiary amyl alcohol
amylene hydrate ...

tertiary butyl alcohol
Trimethylcarbinol, 2-methyl-2-propanol, (CH3)3COH, a denaturant for ethanol. ... (05 Mar 2000) ...

tertiary calcium phosphate
Synonym for tribasic calcium phosphate ... Ca3(PO4)2;used as an antacid. ... Synonym: bone ash, bone phosphate, tertiary calcium phosphate, tricalcium phosphate, whitlockite. ... (05 Mar 2000) ...

tertiary cortex
Synonym for paracortex ... <anatomy> Mid cortical region of lymph node, area that is particularly depleted of T lymphocytes in thymectomised animals and is referred to as the thymus dependent area. ... (18 Nov 1997) ...

tertiary dentin
Morphologically irregular dentin formed in response to an irritant. ... Synonym: irregular dentin, irritation dentin, reparative dentin. ... (05 Mar 2000) ...

tertiary egg membrane
See: egg membrane. ... (05 Mar 2000) ...

tertiary medical care
Specialised consultative care, usually on referral from primary or secondary medical care personnel, by specialists working in a centre that has personnel and facilities for special investigation and treatment. ... (05 Mar 2000) ...

tertiary oesophageal contractions
<radiology> Disordered up-and-down movement of bolus, 5-10% of normal adults in 4-6th decade, location: distal 2/3 of oesophagus aetiology: presbyesophagus, diffuse oesophageal spasm, hyperactive achalasia, neuromuscular disease: diabetes, Parkinsonism, ALS, MS, thyrotoxic myopathy, myotonic dystrophy, obstruction of cardia: neoplasm, distal …

tertiary structure
<biochemistry, chemistry> The third level of structural organisation in a macromolecule. ... The primary structure of a protein (for example) is the amino acid sequence, the secondary structure is the folding of the peptide chain (alpha helical or beta pleated), the tertiary structure is the way in which the helices or sheets are folded or arr …

tertiary syphilid
A syphilitic skin lesion characteristic of the third stage of the disease. ... (05 Mar 2000) ...

tertiary syphilis
<microbiology> An advanced (stage III) syphilitic infection (Treponema pallidum) affecting nervous structures. ... Symptoms include ataxia, dementia and tabes dorsalis (staggering gait and postural difficulties). ... (13 Jan 1998) ...

tertiary villus
The definitive chorionic villus with a vascular core separated from maternal blood by connective tissue, cytotrophoblast, and syncytiotrophoblast. ... (05 Mar 2000) ...

tertiary vitreous
Vitreous fibrils derived from the neuroepithelium of the ciliary body and forming the ciliary zonule. ... (05 Mar 2000) ...

Teschen disease
Porcine polioencephalomyelitis; a disease of swine caused by porcine enterovirus 1 and resembling human poliomyelitis; it is characterised by stiffness, convulsions, paralysis, and prostration, and is widespread in Europe, with most serious losses occurring in Poland and the Czech Republic and Slovakia. ... Synonym: infectious porcine encephalomyeli …

Teschen disease virus
A picornavirus causing Teschen disease of pigs; the virus is normally a harmless inhabitant of the intestinal tract, but virulent strains cause epizootics of the disease. ... Synonym: infectious porcine encephalomyelitis virus. ... (05 Mar 2000) ...

TESD
<abbreviation> Total end-systolic diameter. ... (05 Mar 2000) ...

tesla
In the SI system, the unit of magnetic flux density expressed as kg sec-2 A-1; equal to one weber per square meter. ... Abbreviation: T ... Origin: N. Tesla ... (05 Mar 2000) ...

Tesla current
Synonym for high frequency current ... An alternating electric current having a frequency of 10,000 or more per second; it produces no muscular contractions and does not affect the sensory nerves. ... Synonym: d'Arsonval current, Tesla current. ... (05 Mar 2000) ...

Tesla, Nikola
<person> Serbian-American electrical engineer, 1856-1943. ... See: tesla, Tesla current. ... (05 Mar 2000) ...

tessellated fundus
A normal fundus to which a deeply pigmented choroid gives the appearance of dark polygonal areas between the choroidal vessels, especially in the periphery. ... Synonym: fundus tigre, leopard fundus, leopard retina, mosaic fundus, tigroid fundus, tigroid retina. ... (05 Mar 2000) ...

tessera
Origin: L, a square piece, a die. See Tessellar. ... A small piece of marble, glass, earthenware, or the like, having a square, or nearly square, face, used by the ancients for mosaic, as for making pavements, for ornamenting walls, and like purposes; also, a similar piece of ivory, bone, wood, etc, used as a ticket of admission to theaters, or as a …

Tessier
<person> 20th century French physician. ... See: Tessier classification. ... (05 Mar 2000) ...

Tessier classification
An anatomical classification of facial, craniofacial, and laterofacial clefts that utilises the orbit as the primary structure for reference. Fifteen locations for clefts are differentiated. ... (05 Mar 2000) ...

test
1. A significant chemical reaction. ... 2. A reagent. For specific test. ... (18 Nov 1997) ...

test anxiety scale
A self-reporting test consisting of items concerning fear and worry about taking tests and physiological activity, such as heart rate, sweating, etc., before, during, and after tests. ... (12 Dec 1998) ...

test cross
Crossing of an unknown genotype to a recessive homozygote so that the phenotype of the progeny corresponds directly to the chromosomes carried by the parents of unknown genotype. ... In experimental genetics, a deliberate mating designed to test claims about the pattern of inheritance of one or more traits. ... Synonym: backcross. ... (05 Mar 2000) …

test handle instrument
A root canal instrument the handle of which is similar to a collet chuck and which can be secured in position on the root canal instrument to adjust its effective length. ... (05 Mar 2000) ...

test injection
Intravenous injection of a few milliliters of radiographic contrast medium to screen for allergic or idiosyncratic responses. ... (05 Mar 2000) ...

test letter
See: test types. ... (05 Mar 2000) ...

test meal
Toast and tea, or crackers and tea, or gruel or other bland food, given to stimulate gastric secretion before withdrawing gastric contents for analysis, administration of food containing a substance thought to be responsible for symptoms, such as an allergic reaction. ... (05 Mar 2000) ...

test object
An object having very fine surface markings, mounted on a slide, used to determine the defining power of the objective lens of a microscope, the target in measurement of the visual field. ... (05 Mar 2000) ...

test profile
A combination of laboratory tests usually performed by automated methods and designed to evaluate organ systems of patients upon admission to a hospital or clinic. ... (05 Mar 2000) ...

test solution
A solution of some reagent, in definite strength, used in chemical analysis or testing. ... (05 Mar 2000) ...

test tube
A tube of thin glass closed at one end, used in the examination of urine and other chemical operations, for bacterial cultures, etc. ... (05 Mar 2000) ...