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

quantitative hypertrophy
Synonym for hyperplasia ... <pathology> The abnormal multiplication or increase in the number of normal cells in normal arrangement in a tissue. ... Compare: hypertrophy. ... Origin: Gr. Plasis = formation ... (18 Nov 1997) ...

quantitative perimetry
A plotting of the visual field in isopters of equal retinal sensitivity. ... (05 Mar 2000) ...

quantitative trait
A characteristic showing quantitative inheritance such as skin pigmentation in man. ... (12 Dec 1998) ...

quantity
Origin: F. Quantite, L. Quantitas, fr. Quantus bow great, how much, akin to quam bow, E. How, who. See Who. ... 1. The attribute of being so much, and not more or less; the property of being measurable, or capable of increase and decrease, multiplication and division; greatness; and more concretely, that which answers the question 'How much?'; measu …

quantum
<unit> The fundamental unit of electromagnetic energy. ... (09 Oct 1997) ...

quantum efficiency
Synonym for quantum yield ... The number of photons required for the formation of one oxygen molecule in photosynthesis. Varies from 8-14 depending on the system used to measure it. ... (18 Nov 1997) ...

quantum evolution
An extremely rapid evolutionarychange in a single genetic lineage, thought to result from a sudden and radical change in the species'environment. ... (09 Oct 1997) ...

quantum limit
The shortest wavelength found in an X-ray spectrum. ... (05 Mar 2000) ...

quantum mottle
Mottle caused by the statistical fluctuation of the number of photons absorbed by the intensifying screens to form the light image on the film; faster screens produce more quantum mottle. ... (05 Mar 2000) ...

quantum rectum
See: Q.R. ... Origin: L. However much is correct ... (05 Mar 2000) ...

quantum requirement
The number of quanta of light absorbed required for the transformation of one molecule; the inverse of the quantum yield. ... (05 Mar 2000) ...

quantum satis
See: q.s. ... Origin: L. However much is enough ... Quantum sink, in radiological imaging, the stage at which statistical information reaches its lowest level because of a low photon flux. ... (05 Mar 2000) ...

quantum speciation
The rapid evolution of a newspecies from a small population that ispartially or totally isolated from the parent population, the rapidspeciation occurs due to geneticdrift and founder effect and usuallyinvolves a few mutations that have a big impact on the organisms' observable physical traits. ... (09 Oct 1997) ...

quantum sufficiat
See: q.s. ... Origin: L. However much is enough ... (05 Mar 2000) ...

quantum theory
The theory that the radiation and absorption of energy take place in definite quantities called quanta (e) which vary in size and are defined by the equation e=hv in which h is planck's constant and v is the frequency of the radiation. ... (12 Dec 1998) ...

quantum vis
See: q.v.. ... Origin: L. However much you wish ... (05 Mar 2000) ...

quantum yield
The number of photons required for the formation of one oxygen molecule in photosynthesis. Varies from 8-14 depending on the system used to measure it. ... (18 Nov 1997) ...

Quaranfil virus
An ungrouped arbovirus isolated from human blood and from herons. ... (05 Mar 2000) ...

quarantine
The limitation on the freedom of movement of an individual, to prevent spread of a disease to other members of a population. ... (09 Oct 1997) ...

quarantine period
The time during which an infected individual or an area is kept isolated, avoiding contact with uninfected individuals; can be any specified period of time, varying with the disease in question. The term is derived from the Italian word for forty, since the period of isolation of individuals suspected of plague in the Middle Ages was forty days. …

quark
An elementary subatomic particle that composes a hadron. There areseveral flavours of quarks: ... Up (found innormal matter), down (also found in normalmatter), Charm or Charmed, Bottom or Beauty, Top or Truth ... (09 Oct 1997) ...

quart
1. A measure of fluid capacity; the fourth part of a gallon; the equivalent of 0.9468 liter. An imperial quart contains about 20% more than the ordinary quart, or 1.1359 liters. ... 2. A dry measure holding a little more than the fluid measure. ... Origin: L. Quartus, fourth ... (05 Mar 2000) ...

quartan
A cyclic fever in which 72 hours elapse between attacks. ... (09 Oct 1997) ...

quartan fever
Synonym for malariae malaria ... A malarial fever with paroxysms that recur every 72 hours or every fourth day, reckoning the day of the paroxysm as the first; due to the schizogony and release of merozoites from infected cells, with invasion of new red blood corpuscles by Plasmodium malariae. ... Synonym: quartan fever, quartan malaria. ... (05 Mar 2 …

quartan malaria
Synonym for malariae malaria ... A malarial fever with paroxysms that recur every 72 hours or every fourth day, reckoning the day of the paroxysm as the first; due to the schizogony and release of merozoites from infected cells, with invasion of new red blood corpuscles by Plasmodium malariae. ... Synonym: quartan fever, quartan malaria. ... (05 Mar 2 …

quartan parasite
Synonym for plasmodium malariae ... A protozoan parasite that occurs primarily in subtropical and temperate areas. It is the causal agent of quartan malaria. As the parasite grows it exhibits little ameboid activity. ... (12 Dec 1998) ...

quartation
<chemistry> The act, process, or result (in the process of parting) of alloying a button of nearly pure gold with enough silver to reduce the fineness so as to allow acids to attack and remove all metals except the gold. ... Synonym: inquartation. Compare Parting. ... Origin: L. Quartus the fourth: cf. F. Quartation. So called because usually e …

quarter
1. One of four equal parts into which anything is divided, or is regarded as divided; a fourth part or portion; as, a quarter of a dollar, of a pound, of a yard, of an hour, etc. Hence, specifically: The fourth of a hundred-weight, being 25 or 28 pounds, according as the hundredweight is reckoned at 100 or 112 pounds. ... The fourth of a ton in weig …

quarter-crack
See: sand-crack. ... (05 Mar 2000) ...

quarter-wave plate
<microscopy> A compensator giving a retardation of about 130 nm, and a phase shift of 1/4 ~, thus constituting a device used with a polarizer and analyser designed to produce circularly polarized light. ... (05 Aug 1998) ...

quartering
1. A station. ... 2. Assignment of quarters for soldiers; quarters. ... 3. The division of a shield containing different coats of arms into four or more compartments. One of the different coats of arms arranged upon an escutcheon, denoting the descent of the bearer. ... 4. Quartering block, a block on which the body of a condemned criminal was quarter …

quartermaster
1. An officer whose duty is to provide quarters, provisions, storage, clothing, fuel, stationery, and transportation for a regiment or other body of troops, and superintend the supplies. ... 2. A petty officer who attends to the helm, binnacle, signals, and the like, under the direction of the master. Quartermaster general, in the United States a st …

quarternary structure
The three-dimensional structure of a complex protein, this especially refers to the way the subunits fit together. ... (09 Oct 1997) ...

quartisect
Synonym: quadrisect. ... Origin: L. Quartus, fourth, + seco, pp. Sectus, to cut ... (05 Mar 2000) ...

quartz
<chemical> A form of silica, or silicon dioxide (SiO2), occurring in hexagonal crystals, which are commonly colourless and transparent, but sometimes also yellow, brown, purple, green, and of other colours; also in cryptocrystalline massive forms varying in colour and degree of transparency, being sometimes opaque. ... The crystalline varietie …

quartz glass
A transparent, colourless crystal, made by fusing pure quartz sand, which transmits ultraviolet light. ... (05 Mar 2000) ...

quartz wedge
<microscopy> A compensator consisting of a gradual wedge of quartz of such orientation and dimensions as to show at least several orders of retardation colours as illustrated by the Michel Levy scale of retardation colours and birefringence vs. Thickness of specimen. The Babinet compensator employs two opposing quartz wedges, calibrated in te …

quasi-
<prefix> Prefix meaning seemingly. ... (12 Dec 1998) ...

quasidiploid
Seems to have the usual two full sets of 23 chromosomes and so to have a normal chromosome complement, but on closer examination, this is not so. Many malignant cells are quasidiploid. Also called pseudodiploid. ... (12 Dec 1998) ...

quasidominance
Simulation by a recessive trait of the pedigree of dominant inheritance (i.e., recurrence in several generations) by repeated, and often occult, consanguineous matings. ... Synonym: false dominance. ... (05 Mar 2000) ...

quasidominant
Pattern of inheritance that seems due to a dominant trait but, in fact, is due to the mating of a person who has a recessive disorder (with 2 copies of a gene causing the disease) with someone who is an asymtomatic carrier ( and has 1 copy of the same gene buut no symptoms). ... (12 Dec 1998) ...

quasilinear theory
<physics> A weakly nonlinear theory of plasma oscillations which uses perturbation theory and the random phase approximation to find the time-evolution of the plasma state. ... (09 Oct 1997) ...

quasineutral plasma
<physics> An ionised gas in which positive and negative charges are present in approximately equal numbers. ... (09 Oct 1997) ...

quassation
The breaking up of crude drug materials, such as bark and woody stems, into small pieces to facilitate extraction and other treatment. ... Origin: L. Quassatio, fr. Quasso, pp. -atus, to shake violently, fr. Quatio, to shake ... (05 Mar 2000) ...

quassia
The wood of several tropical American trees of the order Simarubeae, as Quassia amara, Picraena excelsa, and Simaruba amara. It is intensely bitter, and is used in medicine and sometimes as a substitute for hops in making beer. ... Origin: NL. From the name of a negro, Quassy, or Quash, who prescribed this article as a specific. ... Source: Websters …

quater in die
See: q.i.d. ... Origin: L. Four times a day ... (05 Mar 2000) ...

quaternary
1. Fourth in order. ... 2. Containing four elements or groups. ... Origin: L. Quaternarius, from quattuor = four ... (18 Nov 1997) ...

quaternary carbon atom
An atom of carbon to which four other carbon atom's are attached. ... (05 Mar 2000) ...

quaternary structure
The three-dimensional structure of a complex protein, this especially refers to the way the polypeptide subunits fit together. ... (09 Oct 1997) ...

quaternary syphilis
Synonym for parasyphilis ... Any condition indirectly due to syphilis. ... Synonym: metasyphilis, parasyphilosis, quaternary syphilis. ... (05 Mar 2000) ...

quaternion
1. The number four. ... 2. A set of four parts, things, or person; four things taken collectively; a group of four words, phrases, circumstances, facts, or the like. 'Delivered him to four quaternions of soldiers.' (Acts xii. 4) 'Ye elements, the eldest birth Of Nature's womb, that in quaternion run.' (Milton) 'The triads and quaternions with which …

Quatrefages de Breau
Jean L.A. De, French naturalist, 1810-1892. ... See: Quatrefages' angle. ... (05 Mar 2000) ...

Quatrefages' angle
Synonym for parietal angle ... An angle formed by the meeting of the prolongation of two lines tangential to the most prominent part of the zygomatic arch and to the parietofrontal suture on each side; when the lines remain parallel the angle is zero; when they diverge it is negative. ... Synonym: Quatrefages' angle. ... (05 Mar 2000) ...

quazepam
7-Chloro-5-(o-fluorophenyl)-1,3-dihydro-1-(2,2,2-trifluoroethyl)-2H-1,4-benzodiazepine-2-thione;a benzodiazepine derivative used as a sedative and hypnotic. ... (05 Mar 2000) ...

quebec
A province of eastern canada. Its capital is quebec. The region belonged to france from 1627 to 1763 when it was lost to the british. The name is from the algonquian quilibek meaning the place where waters narrow, referring to the gradually narrowing channel of the st. Lawrence or to the narrows of the river at cape diamond. ... (12 Dec 1998) ...

quebrachine
An alkaloid, C21H26N2O3, from quebracho and identical with yohimbine; formerly used in cardiac dyspnea. ... (05 Mar 2000) ...

quebracho
<botany> A Chilian apocynaceous tree (Aspidosperma Quebracho); also, its bark, which is used as a febrifuge, and for dyspnoea of the lung, or bronchial diseases; called also white quebracho, to distinguish it from the red quebracho, a Mexican anacardiaceous tree (Loxopterygium Lorentzii) whose bark is said to have similar properties. ... Origi …

Queckenstedt
Hans, German physician, 1876-1918. ... See: Queckenstedt-Stookey test. ... (05 Mar 2000) ...

Queckenstedt-Stookey test
Compression of the jugular vein in a healthy person causes an increase in the pressure of the spinal fluid in the lumbar region within 10 to 12 seconds, and an equally rapid fall to normal on release of the pressure on the vein; when there is a block of subarachnoid channels, compression of the vein causes little or no increase of pressure in the c …

queen
1. The wife of a king. ... 2. A woman who is the sovereign of a kingdom; a female monarch; as, Elizabeth, queen of England; Mary, queen of Scots. 'In faith, and by the heaven's quene.' (Chaucer) ... 3. A woman eminent in power or attractions; the highest of her kind; as, a queen in society; also used figuratively of cities, countries, etc. ' This que …

queensland
A state in northeastern Australia. Its capital is brisbane. Its coast was first visited by captain cook in 1770 and its first settlement (penal) was located on moreton bay in 1824. The name cooksland was first proposed but honor to queen victoria prevailed. ... (12 Dec 1998) ...

queensland tick typhus
One of the tick-borne rickettsial diseases of the eastern hemisphere, similar to rocky mountain spotted fever, but less severe, with fever, a small ulcer (eschar) at the site of the tick bite, swollen glands nearby (satellite lymphadenopathy), and a red raised (maculopapular) rash. ... (12 Dec 1998) ...

quellung phenomenon
Synonym for Neufeld capsular swelling ... Increase in opacity and visibility of the capsule of capsulated organisms exposed to specific agglutinating anticapsular antibodies. ... Synonym: Neufeld reaction, quellung phenomenon, quellung reaction, quellung test. ... Scrotal swelling, the swelling formed after the embryonic genital swellings have fused t …

Quellung reaction
Swelling of the capsule surrounding a bacterium as a result of interaction with anticapsular antibody, consequently the capsule becomes more refractile and conspicuous. ... (18 Nov 1997) ...

quellung test
Synonym for Neufeld capsular swelling ... Increase in opacity and visibility of the capsule of capsulated organisms exposed to specific agglutinating anticapsular antibodies. ... Synonym: Neufeld reaction, quellung phenomenon, quellung reaction, quellung test. ... Scrotal swelling, the swelling formed after the embryonic genital swellings have fused t …

quench
1. To extinguish; to overwhelm; to make an end of; said of flame and fire, of things burning, and figuratively of sensations and emotions; as, to quench flame; to quench a candle; to quench thirst, love, hate, etc. 'Ere our blood shall quench that fire.' (Shak) 'The supposition of the lady's death Will quench the wonder of her infamy.' (Shak) ... 2. …

quenching
1. The process of extinguishing, removing, or diminishing a physical property such as heat or light; e.g., the cooling of a hot metal rapidly by plunging it into water or oil. ... 2. In beta liquid scintillation counting, the shifting of the energy spectrum from a true to a lower energy; it is caused by a variety of interfering materials in the coun …

Quenu
Eduard A.V.A., French surgeon and anatomist, 1852-1933. ... See: Quenu's haemorrhoidal plexus, Quenu-Muret sign. ... (05 Mar 2000) ...

Quenu-Muret sign
<clinical sign> In aneurysm, well-maintained collateral circulation indicated by issue of blood when the main artery of the limb is compressed and a puncture is made at the periphery. ... (05 Mar 2000) ...

Quenu's haemorrhoidal plexus
Lymphatic plexus's in the skin about the anus. ... (05 Mar 2000) ...

quercetin
<protein> Mutagenic flavonol pigment found in many plants. Inhibits F0F1 ATPases. ... (18 Nov 1997) ...

quercitrin glycosidase
<enzyme> Induced in cultured cell-free microbial preparations from human feces; quercitrin hydrolysed to quercetin ... Registry number: EC 3.2.1.- ... (26 Jun 1999) ...

quercitron
1. The yellow inner bark of the Quercus tinctoria, the American black oak, yellow oak, dyer's oak, or quercitron oak, a large forest tree growing from Maine to eastern Texas. ... 2. Quercitrin, used as a pigment. See Quercitrin. ... Origin: F. Quercitron, the name of the name of tree; L. Quercus an oak + citrus the citron tree. ... Source: Websters Di …

querulent
Denoting one who is ever suspicious, always opposing any suggestion, complaining of ill treatment and of being slighted or misunderstood, easily enraged, and dissatisfied; characteristic of paranoid personalities. ... Origin: L. Querulus, complaining, fr. Queror, to complain ... (05 Mar 2000) ...

Quervain
Fritz de. ... See: de Quervain. ... (05 Mar 2000) ...

quesal
<zoology> The long-tailed, or resplendent, trogon (Pharomachus mocinno, formerly Trogon resplendens), native of Southern Mexico and Central America. ... Synonym:quetzal, and golden trogon. ... The male is remarkable for the brilliant metallic green and gold colours of his plumage, and for his extremely long plumes, which often exceed three feet …

questin oxygenase
<enzyme> Catalyses the conversion of questin to desmethylsulochrin; isolated from aspergillus terreus ... Registry number: EC 1.14.13.- ... (26 Jun 1999) ...

questionnaire
A list of questions submitted orally or in writing to obtain personal information or statistically useful data. ... Holmes-Rahe questionnaire, a survey to measure in life change units the stressfulness of various life events such as an acute illness, bankruptcy, death of a loved one, etc. ... (05 Mar 2000) ...

questionnaires
Predetermined sets of questions used to collect data - clinical data, social status, occupational group, etc. The term is often applied to a self-completed survey instrument. ... (12 Dec 1998) ...

Quetelet
Lambert Alphonse Jacques, 1796-1857. Belgian astronomer and mathematician. ... (05 Mar 2000) ...

queuine tRNA-ribosyltransferase
<enzyme> Catalyses exchange of modified base q in tRNA with guanine without breaking the polynucleotide chain ... Registry number: EC 2.4.2.29 ... Synonym: queuine tRNA transferase, tRNA-guanine transferase, tRNA guanine transglycosylase, guanine-tRNA transglycosylase, guanine, queuine-tRNA transglycosylase, q-insertase, queuine insertase, guan …

Queyrat
Auguste, French dermatologist, *1872. ... See: erythroplasia of Queyrat. ... (05 Mar 2000) ...

quick
1. Alive; living; animate; opposed to dead or inanimate. 'Not fully quyke, ne fully dead they were.' (Chaucer) 'The Lord Jesus Christ, who shall judge the quick and the dead at his appearing and his kingdom.' (2 Tim. Iv. 1) 'Man is no star, but a quick coal Of mortal fire.' (Herbert) ... In this sense the word is nearly obsolete, except in some comp …

quick cure resin
Synonym for autopolymer resin ... Autopolymerizing resin, any resin that can be polymerised by chemical catalysis rather than by the application of heat; used in dentistry for dental restoration, denture repair, and impression trays. ... Synonym: activated resin, cold cure resin, cold-curing resin, quick cure resin, self-curing resin. ... (05 Mar 2000 …

quick-stop mutant
A bacterial mutant that ceases replication immediately when the temperature reaches a certain level. ... Compare: temperature-sensitive mutant. ... (05 Mar 2000) ...

Quick, Armand
<person> U.S. Physician, 1894-1978. ... See: Quick's method, Quick's test. ... (05 Mar 2000) ...

Quick's method
Synonym for prothrombin test ... A quantitative test for prothrombin in the blood based on the clotting time of oxalated blood plasma in the presence of thromboplastin and calcium chloride; measures the integrity of the extrinsic and common pathways of coagulation. ... See: prothrombin time. ... Synonym: Quick's method, Quick's test. ... (05 Mar 2000)< …

Quick's test
Synonym for prothrombin test ... A quantitative test for prothrombin in the blood based on the clotting time of oxalated blood plasma in the presence of thromboplastin and calcium chloride; measures the integrity of the extrinsic and common pathways of coagulation. ... See: prothrombin time. ... Synonym: Quick's method, Quick's test. ... (05 Mar 2000)< …

quicken
1. To come to life; to become alive; to become vivified or enlivened; hence, to exhibit signs of life; to move, as the foetus in the womb. 'The heart is the first part that quickens, and the last that dies.' (Ray) 'And keener lightnings quicken in her eye.' (Pope) 'When the pale and bloodless east began To quicken to the sun.' (Tennyson) ... 2. To m …

quicksand
Sand easily moved or readily yielding to pressure; especially, a deep mass of loose or moving sand mixed with water, sometimes found at the mouth of a river or along some coasts, and very dangerous, from the difficulty of extricating a person who begins sinking into it. 'Life hath quicksands, Life hath snares!' (Longfellow) ... Source: Websters Dict …

quicksilver
<chemistry> The metal mercury; so called from its resemblance to liquid silver. Quicksilver horizon, a mercurial artificial horizon. See Horizon. Quicksilver water, a solution of mercury nitrate used in artificial silvering; quick water. ... Origin: Quick living + silver; so called from its fluidity; cf. G. Quecksilber, L. Argentum vivum. See …

quiescence
Quietness. In cells, the state of not dividing, in neurons, the state of not firing. ... (18 Nov 1997) ...

quiescent
Marked by a state of inactivity or repose. ... Origin: L. Quiescent, part. Of quiescere = to be silent ... (18 Nov 1997) ...

quiescent stem cell
A stem cell that is not at that time undergoing repeated cell cycles but that might be stimulated so to do later. For example: the satellite cells in the skeletal muscles of mammals that are quiescent myoblasts that will proliferate after wounding and give rise to more muscle cells by fusion. ... (18 Nov 1997) ...

quiet
1. In a state of rest or calm; without stir, motion, or agitation; still; as, a quiet sea; quiet air. 'They . . . Were quiet all the night, saying, In the morning, when it is day, we shall kill him.' (Judg. Xvi. 2) ... 2. Free from noise or disturbance; hushed; still. ... 3. Not excited or anxious; calm; peaceful; placid; settled; as, a quiet life; a …

quiet hip disease
Synonym for Legg-Calve-Perthes disease ... perthes disease ...

quiet iritis
Iritis without inflammatory signs such as redness or oedema of the cornea. ... (05 Mar 2000) ...

quiet lung
The collapse of a lung during thoracic operations undertaken to facilitate surgical procedure through absence of lung movement. ... (05 Mar 2000) ...

quill
1. One of the large feathers of a bird's wing, or one of the rectrices of the tail; also, the stock of such a feather. ... 2. A pen for writing made by sharpening and splitting the point or nib of the stock of a feather; as, history is the proper subject of his quill. ... 3. <zoology> A spine of the hedgehog or porcupine. The pen of a squid. Se …

quillwort
<botany> Any plant or species of the genus Isoetes, cryptogamous plants with a cluster of elongated four-tubed rushlike leaves, rising from a corm, and containing spores in their enlarged and excavated bases. There are about seventeen American species, usually growing in the mud under still, shallow water. So called from the shape of the shap …