Q

Q
Q

Symbol for coulomb; quantity; quaternary; glutamine; glutaminyl; pseudouridine; coenzyme Q; electric charge; the second product formed in an enzyme-catalyzed reaction.

Q
Q

Symbol for blood flow. See flow (3) . [quantity + an overdot denoting the time derivative]

QO
Q_O, Q_O2

Symbols for oxygen consumption (1).

Q10
Q₁₀

Symbol for the increase in rate of a process produced by raising the temperature 10°C; rate of contraction of an excised heart approximately doubles for every 10°C ( i.e., Q₁₀ = 2).

QCO2
Q_CO₂

Symbol for the microliters STPD of CO₂ given off per milligram of tissue per hour.

-Q6 -Q₆

Symbol for ubiquinone-6.

-Q10 -Q₁₀

Symbol for ubiquinone-10.

q
q

1. In cytogenetics, symbol for long arm of a chromosome (in contrast to p for the short arm). 2. Abbreviation for [L.] quodque, each; every. 3. q. Symbol for heat.

QALY
QALY

Acronym for quality-adjusted life years, an adjustment that allows for prevalence of activity limitation.

Q-banding
Q-banding

See Q-banding stain.

q.d.
q.d.

Abbreviation for L. quaque die, every day.

QF
QF

Abbreviation for quality factor, the same as relative biologic effectiveness in radiation protection.

QH2
QH₂

Symbol for ubiquinol.

q.h.
q.h.

Abbreviation for L. quaque hora, every hour.

q.i.d.
q.i.d.

Abbreviation for L. quater in die, four times a day.

q.l.
q.l.

Abbreviation for L. quantum libet, as much as desired.

QNB
QNB

Abbreviation for quinuclidinyl benzilate.

Q.R.
Q.R.

Abbreviation for [L] quantum rectum, however much is correct.

q.s.
q.s.

Abbreviation for L. quantum sufficiat or satis, as much as suffices.

Q-TWiST
Q-TWiST

Time without symptoms or toxicity; a quality of life measurement. [acronym, quality time without symptoms or toxicity]

quack
quack (kwak)

SYN: charlatan. [Abbreviation of quacksalver, Dutch q., to boast + salf, cream]

quackery
quackery (kwak′er-e)

SYN: charlatanism.

quadrangular
quadrangular (kwah-drang′u-lar)

Having four angles. [L. quadrangularis, fr. quadrangulum, quadrangle]

quadrant
quadrant (kwah′drant)

One quarter of a circle. In anatomy, roughly circular areas are divided for descriptive purposes into quadrants. The abdomen is divided into right upper and lower and left upper and lower quadrants by a horizontal and a vertical line intersecting at the umbilicus. Quadrants of the ocular fundus (superior and inferior nasal, superior and inferior temporal) are demarcated by a horizontal and a vertical line intersecting at the optic disk. The tympanic membrane is divided into anterosuperior, anteroinferior, posterosuperior, and posteroinferior quadrants by a line drawn across the diameter of the drum in the axis of the handle of the malleus and another intersecting the first at right angles at the umbo. [L. quadrans, a quarter]

quadrantanopia
quadrantanopia (kwah′drant-an-op′e-a)

Loss of vision in a quarter section of the visual field of one or both eyes; if bilateral, it may be homonymous or heteronymous, binasal or bitemporal, or crossed, e.g., involving the upper quadrant in one eye and the lower quadrant in the other. SYN: quadrantic hemianopia.

quadrate
quadrate (kwah′drat)

Having four equal sides; square. [L. quadratus, square]

quadratus quadratus

q. lumborum fascia anterior layer of thoracolumbar fascia.

quadri- quadri-

Four. [L. quattuor]

quadribasic
quadribasic (kwah-dri-ba′sik)

Denoting an acid having four hydrogen atoms that are replaceable by atoms or radicals of a basic character.

quadriceps
quadriceps (kwah′dri-seps)

SYN: four-headed muscle. [L. fr. quadri- + caput, head]

quadricepsplasty
quadricepsplasty (kwah-dri-seps′plas-te)

A corrective surgical procedure on the quadriceps femoris muscle and tendon to release adhesions and improve mobility. [quadriceps + G. plastos, formed]

quadricuspid
quadricuspid (kwah-dri-kus′pid)

SYN: tetracuspid.

quadridigitate
quadridigitate (kwah′dri-dij′i-tat)

SYN: tetradactyl. [quadri- + L. digitus, digit]

quadrigeminal
quadrigeminal (kwah′dri-jem′i-nal)

Four-fold. [quadri- + L. geminus, twin]

quadrigeminum
quadrigeminum (kwah′dri-jem′i-num)

One of the quadrigeminal bodies.

quadrigeminus
quadrigeminus (kwah-dri-jem′i-nus)

SYN: quadruplet. [L.]

quadrigeminy
quadrigeminy (kwah′dri-jem′i-ne)

SYN: quadrigeminal rhythm.

quadriparesis
quadriparesis (kwah′dri-pa-re′sis)

SYN: tetraparesis.

quadriplegia
quadriplegia (kwah′dri-ple′je-a)

Paralysis of all four limbs. SYN: tetraplegia. [quadri- + G. plege, stroke]

quadriplegic
quadriplegic (kwah′dri-ple′jik)

Pertaining to or afflicted with quadriplegia. SYN: tetraplegic.

quadripolar
quadripolar (kwah′dri-po′lar)

Having four poles.

quadrisect
quadrisect (kwah′dri-sekt)

To divide into four parts. SYN: quartisect. [quadri- + L. seco, pp. sectus, to cut]

quadrisection
quadrisection (kwah′dri-sek′shun)

Division into four parts.

quadritubercular
quadritubercular (kwah′dri-too-ber′ku-lar)

Having four tubercles or cusps, as a molar tooth. [quadri- + L. tuberculum, tubercle]

quadrivalent
quadrivalent (kwah-dri-va′lent)

Having the combining power (valency) of four. SYN: tetravalent.

quadruped
quadruped (kwah′droo-ped)

A four-footed animal. [L. quattuor, four, + pes (ped-), foot]

quadruplet
quadruplet (kwah′drup-let, kwa-droo′plet)

One of four children born at one birth. SYN: quadrigeminus. [L. quadruplus, fourfold]

quality assurance
quality assurance

Programs of regular assessment of medical and nursing activities to evaluate the quality of medical care.

Quant
Quant

C. A. J., early 20th century Dutch physician. See Q. sign.

quanta
quanta (kwahn′ta)

Plural of quantum. [L.]

quantile
quantile (kwon′til)

Division of a distribution into equal, ordered subgroups; deciles are tenths, quartiles are quarters, quintiles are fifths, terciles are thirds, centiles are hundredths. [L. quantum, how much, + -ilis, adj. suffix]

quantum
quantum, pl .quanta (kwahn′tum, -ta)

1. A unit of radiant energy (ε) varying according to the frequency (ν) of the radiation. 2. A certain definite amount. [L. how much]
q. mottle q. mottle. See entries under under mottle.
q. rectum Q.R. [L. however much is correct]
q. satis q.s. [L. however much is enough]
q. sink in radiologic imaging, the stage at which statistical information reaches its lowest level because of a low photon flux.
q. sufficiat q.s. [L. however much is enough]
q.> vis (q.v.) q.v. [L. however much you wish]

quarantine
quarantine (kwar′an-ten)

1. A period (originally 40 days) of detention of vessels and their passengers coming from an area where an infectious disease prevails. 2. To detain such vessels and their passengers until the incubation period of an infectious disease has passed. 3. A place where such vessels and their passengers are detained. 4. The isolation of a person with a known or possible contagious disease. [It. quarantina fr. L. quadraginta, forty]

quark
quark (qwark)

A fundamental particle believed to be the primary constituent of all mesons and baryons; quarks have a charge that is a fraction of 1 electron charge and interact through electromagnetic and nuclear forces. Six varieties are thought to exist with the unusual names of up, down, strange, charmed, bottom, and top. [a word of indeterminate sense used by James Joyce in his novel Finnegans Wake]

quart
quart (kwort)

1. A measure of fluid capacity; the fourth part of a gallon; the equivalent of 0.9468 liter. An imperial q. contains about 20% more than the ordinary q., or 1.1359 liters. 2. A dry measure holding a little more than the fluid measure. [L. quartus, fourth]

quartan
quartan (kwor′tan)

Recurring every fourth day, including the first day of an episode in the computation, i.e., after a free interval of two days. [L. quartanus, relating to a fourth (thing)]
double q. denoting malaria infection with two independent groups of q. parasites, so that paroxysms occur on two successive days followed by one day without fever.
triple q. denoting malaria infection with three independent groups of q. parasites, so that a paroxysm occurs every day, resembling a double tertian or a quotidian fever.

quartisect
quartisect (kwor′ti-sekt)

SYN: quadrisect. [L. quartus, fourth, + seco, pp. sectus, to cut]

quartz
quartz (kworts)

A crystalline form of silicon dioxide used in chemical apparatus and in optical and electric instruments.

quasidominance
quasidominance (kwa-si-dom′i-nans)

Simulation of dominant inheritance of a recessive trait, e.g., a heterozygote mating with an affected homozygote resulting in the manifestation of the recessive trait generation after generation. SYN: false dominance, pseudodominance.

quasidominant
quasidominant (kwa-si-dom′i-nant)

Denoting a trait in an inbred pedigree that exhibits quasidominance.

quassation
quassation (kwah-sa′shun)

The breaking up of crude drug materials, such as bark and woody stems, into small pieces to facilitate extraction and other treatment. [L. quassatio, fr. quasso, pp. -atus, to shake violently, fr. quatio, to shake]

quassia
quassia (kwah′she-a)

Bitterwood, the heartwood of Picrasma excelsa (Picraena excelsa), known as Jamaica q., or of Q. amara (family Simarubaceae), known as Surinam q.; a bitter tonic; the infusion has been administered by enema in the treatment of threadworms. [Quassi, a resident of Surinam who used it as a tonic]

quater in die
quater in die (kua′ter-in-de-a)

See q.i.d. [L. four times a day]

quaternary
quaternary (Q) (kwah′ter-nar-e, kwah-ter′ne-re)

1. Denoting a chemical compound containing four elements; e.g., NaHSO₄. Cf.:q. structure. 2. Fourth in a series. 3. Relating to organic compounds in which some central atom is attached to four functional groups; applied to the usually trivalent nitrogen in its “onium” state, R₄N⁺, “q. nitrogen.” 4. Referring to a level of structure of macromolecules in which more than one biopolymer is present. Cf.:q. structure. [L. quaternarius, fr. quaterni, four each, fr. quattuor, four, + -arius, adj. suffix]

Quatrefages de Breau
Quatrefages de Breau

Jean L.A. de, French naturalist, 1810–1892. See Quatrefages angle.

quazepam
quazepam (kwa′ze-pam)

A benzodiazepine derivative used as a sedative and hypnotic.

quebrachine
quebrachine (ke-brah′chen)

An alkaloid, C₂₁H₂₆N₂O₃, from quebracho and identical with yohimbine; formerly used in cardiac dyspnea.

quebracho
quebracho (ke-brah′cho)

The dried bark of a genus of trees, Aspidosperma quebrachoblanco (family Apocynaceae); has been used as a respiratory stimulant in emphysema, dyspnea, and chronic bronchitis; the two chief alkaloids are aspidospermine and quebrachine. [Port. quebrahacho, fr. quebrar, to break, + hacha, axe, referring to the hardness of the wood]

Queckenstedt
Queckenstedt

Hans, German neurophysiologist, 1876–1918. See Q.-Stookey test.

quenching
quenching (kwench′ing)

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 counting solution, including foreign chemicals and coloring agents. 3. The process of stopping a chemical or enzymatic reaction. [M. E. quenchen, fr. O.E. acwencan]
fluorescence q. a technique used in investigations dealing with binding of antigens (haptens) by purified antibodies, applicable in cases in which the bound antigen (hapten) absorbs (quenches) light emitted during fluorescence of protein (antibody) excited by ultraviolet light.

Quénu
Quénu

Eduard A.V.A., French surgeon and anatomist, 1852–1933. See Q. hemorrhoidal plexus, Q.-Muret sign.

quercetin
quercetin (kwer′se-tin)

An aglycon of quercitrin, rutin, and other glycosides; occurs usually as the 3-rhamnoside; used in the treatment of abnormal capillary fragility. SYN: meletin, sophoretin.

quercus
quercus (kwer′kus)

The bark of Q. alba, white oak or stone oak; formerly used as an astringent. [L. oak]

querulent
querulent (kwer′u-lent)

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. [L. querulus, complaining, fr. queror, to complain]

Quervain
Quervain

Fritz de. See de Q..

questionnaire
questionnaire (kwes-chun-ar′)

A list of questions submitted orally or in writing to obtain personal information or statistically useful data.
Holmes-Rahe q. 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.

Quetelet
Quetelet

Lambert Alphonse Jacques, 1796–1857. Belgian astronomer and mathematician.

Queyrat
Queyrat

Auguste, French dermatologist, *1872. See erythroplasia of Q..

Quick
Quick

Armand J., U.S. physician, 1894–1978. See Q. method, Q. test.

quick
quick (kwik)

1. Pregnant with a child whose fetal movements are recognizable. 2. A sensitive part, painful to touch. [A.S. cwic, living]

quickening
quickening (kwik′en-ing)

Signs of life felt by the mother as a result of fetal movements, usually noted from 16 to 20 weeks of pregnancy. [A.S. cwic, living]

quicklime
quicklime (kwik′lim)

Unslaked lime. See lime (2) .

quicksilver
quicksilver (kwik′sil′ver)

SYN: mercury.

quiescent
quiescent (kwi-es′ent)

At rest or inactive.

quin-2
quin-2

(2-[(2-bis-[carboxymethyl]aono-5-methoxyphenyl)-methyl-6- methoxy-8-bis[carboxymethyl]aminoquinoline);a fluorescent compound that binds Ca⁺⁺ tightly. The wavelengths of light that cause fluorescence when Ca⁺⁺ is bound are longer than the wavelengths that cause fluorescence when Ca⁺⁺ is not bound. When excited at two different wavelengths, the ratio of the fluorescence intensities at the two wavelengths gives the ratio of the concentrations of bound to free Ca⁺⁺. Free q. concentration can be measured precisely, so free Ca⁺⁺ concentration can be calculated precisely. Q. may be injected into cells to measure moment-to-moment changes in intracellular Ca⁺⁺ concentration. SEE ALSO: aequorin, fura-2.

quin- quin-, quino-

Root of quinoline and quinone, hence used in many names of substances containing these structures ( e.g., quinine, quinol).

quina
quina (ke′na, kwe′na)

SYN: cinchona. [Sp., fr. Peruv. q. or kina, cinchona]

quinacrine hydrochloride
quinacrine hydrochloride (kwin′a-kren, -krin)

An acridine derivative, used as an antimalarial that destroys the trophozoites of Plasmodium vivax and P. falciparum, but does not affect the gametocytes, sporozoites, or exoerythrocytic stage of parasites; also used as an anthelmintic. As a dihydrochloride, it is used as a stain in cytogenetics to demonstrate Y chromatin by fluorescent microscopy. Q. intercalates with DNA and also uncouples oxidation and photophosphorylation. SYN: atabrine hydrochloride, mepacrine hydrochloride.

quinaldic acid
quinaldic acid (kwin-al′dik)

Quinoline-2-carboxylic acid;a product of l-tryptophan catabolism, via kynurenic acid, found in human urine. SYN: quinaldinic acid.

quinaldine red
quinaldine red (kwin′al-den)

A styrene-quinolinium iodide; used as a pH indicator (turns red at pH 3.2) in a 1% ethanol solution.

quinaldinic acid
quinaldinic acid (kwin-al-din′ik)

SYN: quinaldic acid.

quinaquina
quinaquina (ke′na-ke′na, kwin′a-kwin′a)

SYN: cinchona. [a reduplication of Sp. quina, cinchona]

quinate
quinate (kwi′nat, kwin′at)

A salt or ester of quinic acid.
q. dehydrogenase an oxidoreductase catalyzing reaction of q. and NAD⁺ to form 3-dehydroquinate and NADH.

quinazolines
quinazolines (kwin-a-zol′ens)

A class of alkaloids that are derived biosynthetically from anthranilic acid.

quince
quince (kwints)

The edible fruit of Cydonia oblongata (family Rosaceae); the seeds have demulcent properties.

Quincke
Quincke

Heinrich I., German physician, 1842–1922. See Q. pulse, Q. puncture, Q. sign.

quinestradiol
quinestradiol, quinestradol (kwin′es-tra-di′ol, kwin-es′tra-dol)

An estrogen.

quinestrol
quinestrol (kwin-es′trol)

The 3-cyclopentyl ether of ethinyl estradiol; used as the estrogenic component in oral contraceptive preparations; the compound is stored in fat and can be taken weekly; an estrogen.

quinethazone
quinethazone (kwin-eth′a-zon)

A diuretic and antihypertensive agent.

quingestanol acetate
quingestanol acetate (kwin-jes′ta-nol)

A progestational agent.

quinhydrone
quinhydrone (kwin-hi′dron)

A mixture of equimolecular quantities of quinone and hydroquinone; used in pH determinations ( i.e., via a q. electrode).

quinic acid
quinic acid (kwin′ik)

l-q.;the (−) isomer is an acid found in cinchona bark and elsewhere in plants; 5-dehydroquinic acid is an intermediate in the biosynthesis of l-phenylalanine, l-tyrosine, and l-tryptophan from carbohydrate precursors; q. forms a γ-lactone upon heating. SYN: kinic acid.

quinidine
quinidine (kwin′i-den, -din)

β-Quinine;one of the alkaloids of cinchona, a stereoisomer of quinine (the C-9 epimer); used as an antimalarial; also used in the treatment of atrial fibrillation and flutter, and paroxysmal ventricular tachycardia. SYN: conquinine.
q. polygalacturonate a salt of q. that may be used in place of q. sulfate; antiarrhythmic agent. See q. sulfate. SEE ALSO: q..
q. sulfate the salt of q. that is customarily administered as a cardiac antiarrhythmic agent. The drug depresses myocardial conduction, contraction, automaticity and contraction; it also by a direct effect impairs conduction through the atrioventricular node. Has vagolytic action that may increase heart rate. SEE ALSO: q..

quinine
quinine (kwi′nin, -nen, kwin′-in, -en)

The most important of the alkaloids derived from cinchona; an antimalarial effective against the asexual and erythrocytic forms of the parasite, but having no effect on the exoerythrocytic (tissue) forms. It does not produce a radical cure of malaria produced by Plasmodium vivax, P. malariae, or P. ovale, but is used in the treatment of cerebral malaria and other severe attacks of malignant tertian malaria, and in malaria produced by chloroquine-resistant strains of P. falciparum; it is also used as an antipyretic, analgesic, sclerosing agent, stomachic, and oxytocic (occasionally), and in the treatment of atrial fibrillation, myotonia congenita, and other myopathies.
q. bisulfate the acid sulfate of q., very soluble in water.
q. carbacrylic resin resin.
q. ethylcarbonate an almost tasteless form of q. that is poorly absorbed from the intestinal tract.
q. sulfate the most frequently prescribed salt of q..
q. and urea hydrochloride sclerosing agent for treatment of internal hemorrhoids, hydrocele, and varicose veins, containing not less than 58% and not more than 65% of anhydrous q..
q. urethan a mixture of urethan and q. hydrochloride; a sclerosing agent for the treatment of varicose veins.

quininism
quininism (kwi′ni-nizm, kwin′i-)

SYN: cinchonism.

Quinlan test
Quinlan test

See under test.

quino- quino-

See quin-.

quinocide hydrochloride
quinocide hydrochloride (kwin′o-sid)

An antimalarial comparable to primaquine in effectiveness and scope.

quinol
quinol (kwin′ol)

SYN: hydroquinone.

quinoline
quinoline (kwin′o-len, -lin)

1. Benzo[b]pyridine; 1-benzazine;a volatile nitrogenous base obtained by the distillation of coal tar, bones, alkaloids, etc.; a basic structure of many dyes and drugs; also used as an antimalarial. SYN: chinoleine, leucoline. 2. One of a class of alkaloids based on the q. (1) structure.

quinolinic acid
quinolinic acid (kwin-o-lin′ik)

A catabolite of l-tryptophan and a precursor of NAD⁺.

quinolinol
quinolinol (kwin-ol′in-ol)

SYN: 8-hydroxyquinoline.

quinolizidines
quinolizidines (kwin-ol-i-za-dens)

A class of alkaloids based on the quinolizidine (norlupinane) structure.

quinology
quinology (kwin-ol′o-je)

The botany, chemistry, pharmacology, and therapeutics of cinchona and its alkaloids. [Sp. quina, cinchona, + G. logos, study]

quinolones
quinolones (kwin′o-lonz)

A class of synthetic broad-spectrum antibacterial agents that exhibit bactericidal action ( e.g., ciprofloxacin). SYN: fluoroquinolone.

quinone
quinone (kwin′on, kwi′non)

1. General name for aromatic compounds bearing two oxygens in place of two hydrogens, usually in the para position; the oxidation product of a hydroquinone. 2. SYN: 1,4-benzoquinone (1) .
q. reductase SYN: NADPH dehydrogenase (q.).

quinovose
quinovose (kwin′o-vos)

SYN: d-epirhamnose.

quinquedigitate
quinquedigitate (kwin′kwe-dij′i-tat)

SYN: pentadactyl. [L. quinque, five, + digitus, digit]

quinquetubercular
quinquetubercular (kwin′kwe-too-ber′ku-lar)

Having five tubercles or cusps, as certain molar teeth. [L. quinque, five, + tuberculum, tubercle, dim. of tuber, a swelling]

quinquevalent
quinquevalent (kwin-kwe-va′lent)

SYN: pentavalent. [L. quinque, five, + valentia, strength]

quinquina
quinquina (kwin-kwi′na)

SYN: cinchona.

quinsy
quinsy (kwin′ze)

Obsolete term for peritonsillar abscess. [M.E. quinsie (quinesie), a corruption of L. cynanche, sore throat]
lingual q. phlegmonous inflammation of the lingual tonsil and neighboring structures.

quintan
quintan (kwin′tan)

Recurring every fifth day, including the first day of an episode in the computation, i.e., after a free interval of three days. [L. quintus, fifth]

quintuplet
quintuplet (kwin-tup′let)

One of five children born at one birth. [L. quintuplex, fivefold]

quinuclidinyl benzilate
quinuclidinyl benzilate (QNB) (kwin-oo′-kli-di-nil ben′-zil-at)

A highly potent anticholinergic agent exhibiting 50- to 100-fold greater potency over atropine in binding with and blocking muscarinic cholinergic receptors. Originally developed as a potential military incapacitating agent, it is currently extensively used as a radioactive agent (usually tritiated &cbond;H3 &cbond;QNB) to identify and label muscarinic receptors in pharmacologic studies.

quisqualate
quisqualate (kwiz′kwa-lat)

An agonist at glutamate receptors of the amino-3-hydroxy-5-methyl-isoxazole-4-propionic acid (AMPA) type. The anion formed when quisqualic acid is dissolved in water. See quisqualic acid.

quisqualic acid
quisqualic acid (kwiz′kwa-lik)

Excitatory amino acid (EAA) obtained from the seeds of Quisqualis chinensis. Used to identify a specific subset of non–N-methyl D-aspartate (NMDA) EAA receptor; has anthelmintic properties.

quodque
quodque (q)

Each, every. [L.]

quotidian
quotidian (kwo-tid′e-an)

Daily; occurring every day. [L. quotidianus, daily, fr. quot, as many as, + dies, day]

quotient
quotient (kwo′shent)

The number of times one amount is contained in another; the ratio of two numbers. SEE ALSO: index (2) , ratio. [L. quoties, how often]
achievement q. a ratio, percentile rating, or related q. denoting the amount a child has learned in relation to peers of his or her age or level of education.
Ayala q. SYN: Ayala index.
cognitive laterality q. (CLQ) test for difference in cognitive performance of left and right sides of the brain.
extremal q. the ratio of the rate in the jurisdiction with the highest rate of interventions such as surgical procedures to the rate in the jurisdiction with the lowest rate.
intelligence q. (IQ) the psychologist's index of measured intelligence as one part of a two-part determination of intelligence, the other part being an index of adaptive behavior and including such criteria as school grades or work performance. IQ is a score, or similar quantitative index, used to denote a person's standing relative to age peers on a test of general ability, ordinarily expressed as a ratio between the person's score on a given test and the score that the average individual of comparable age attained on the same test, the ratio being computed by the psychologist or determined from a table of age norms, such as the various Wechsler intelligence scales.
Meyerhof oxidation q. an index for the effect of oxygen on glycolysis and on fermentation ( I.E., on the Pasteur effect); equal to the rate of anaerobic fermentation minus the rate of aerobic respiration divided by the rate of oxygen uptake.
P/O q. SYN: P/O ratio.
protein q. the number obtained by dividing the quantity of globulin of the blood plasma by the quantity of albumin.
respiratory q. (R.Q.) the steady-state ratio of carbon dioxide produced by tissue metabolism to oxygen consumed in the same metabolism; for the whole body, normally about 0.82 under basal conditions; in the steady state, the respiratory q. is equal to the respiratory exchange ratio. SYN: respiratory coefficient.
spinal q. SYN: Ayala index.

quot. op. sit.
quot. op. sit.

Abbreviation for quoties opus sit, as often as necessary.

q.v.
q.v.

Abbreviation for [L] quantum> vis, as much as you wish.