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]

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).

QO Q_O , Q_O2

Symbols for oxygen consumption (1).

QCO2 Q_CO2

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

-Q10 -Q₁₀

Symbol for ubiquinone-10.

-Q6 -Q₆

Symbol for ubiquinone-6.

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. 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.

Q-H2 Q-H₂

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.

quack quack (kwak)

charlatan [Abbreviation of quacksalver, Dutch quack, to boast + salf, cream]

quackery quackery (kwak´er-e)

charlatanism

quadrangular quadrangular (kwah-drang´yu-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 q.'s. The abdomen is divided into right upper and lower, and left upper and lower q.'s by a horizontal and a vertical line intersecting at the umbilicus. Q.'s 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 q.'s 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.quadrantic hemianopia;

quadrate quadrate (kwah´drat)

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

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)

Having four heads; denoting a muscle of the thigh, q. femoris muscle, and one of the calf, q. surae muscle, or the combined gastrocnemius (with two heads), soleus, and plantaris, more commonly called triceps surae muscle, the plantaris being counted as a separate muscle. [L. fr. quadri- + caput, head]

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

A corrective surgical procedure on the quadriceps femoris. [quadriceps + G. plastos, formed]

quadricuspid quadricuspid (kwah-dri-kus´pid)

tetracuspid

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

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)

quadruplet [L.]

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

quadrigeminal rhythm

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

tetraparesis

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

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

quadriplegic quadriplegic (kwah´dri-ple´jik)

Pertaining to or afflicted with quadriplegia.tetraplegic;

quadripolar quadripolar (kwah´dri-po´lar)

Having four poles.

quadrisect quadrisect (kwah´dri-sekt)

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

quadrisection quadrisection (kwah´dri-sek´shun)

Division into four parts.

quadritubercular quadritubercular (kwah´dri-tu-ber´kyu-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.tetravalent;

quadruped quadruped (kwah´dru-ped)

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

quadruplet quadruplet (kwah´drup-let, kwa-dru´plet)

One of four children born at one birth.quadrigeminus; [L. quadruplus, four fold]

qualimeter qualimeter (kwah-lim´e-ter)

An obsolete device for estimating the degree of hardness of x-rays. [L. qualis, of what kind, + G. metron, measure]

quality assurance quality assurance

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

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.centile; [L. quantum, how much, + -ilis, adj. suffix]

Quant's sign Quant's sign

See under sign.

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

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

quantum mottle quantum mottle

See quantum mottle.

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; q.'s 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.

quarter-crack quarter-crack (kwor´ter-krak)

See sand-crack.

quartisect quartisect (kwor´ti-sekt)

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 by a recessive trait of the pedigree of dominant inheritance (i.e., recurrence in several generations) by repeated, and often occult, consanguineous matings.false dominance;

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

1. Denoting a chemical compound containing four elements; e.g., NaHSO₄. Cf. quaternary 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⁺, "quaternary nitrogen." 4. Referring to a level of structure of macromolecules in which more than one biopolymer is present. Cf. quaternary 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)

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.

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 physician, 1876-1918. See Q.-Stookey test.

queen queen (kwen)

A female cat of breeding age.

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.'s hemorrhoidal plexus; Q.-Muret sign.

quercetin quercetin (kwer´se-tin)

3,3´,4´,5,7-pentahydroxyflavone;an aglycon of quercitrin, rutin, and other glycosides; occurs usually as the 3-rhamnoside; used in the treatment of abnormal capillary fragility.meletin, sophoretin;

quercus quercus (kwer´kus)

The bark of Quercus 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 Quervain.

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.'s method, 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 the 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)

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 quin-2 concentration can be measured precisely, so free Ca⁺⁺ concentration can be calculated precisely. Quin-2 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)

cinchona [Sp., fr. Peruv. quina or kina, cinchona]

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

An acridine derivative, C₂₃H₃₀ClN₃O. 2HCl. 2H₂O, 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.h. intercalates with DNA and also uncouples oxidative and photophosphorylation.atebrine 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.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)

quinaldic acid

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

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 quinate 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.'s disease, edema, pulse, puncture, sign.

quinestradiol quinestradiol , quinestradol (kwin´es-tra-dI´ol, kwin-es´tra-dol)

3-(Cyclopentyloxy)estra-1,3,5(10)-triene-16a,17beta-diol;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)

7-Chloro-2-ethyl-1,2,3,4-tetrahydro-4-oxo-6-quinazolinesulfonamide;a diuretic and antihypertensive agent.

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

3-(Cyclopentyloxy)-19-nor-17a-pregna-3,5-dien-20-yn-17-ol acetate;a progestational agent.

quinhydrone quinhydrone (kwin-hI´dron)

A mixture of equimolecular quantities of quinone and hydroquinone; used in pH determinations (q. electrode).

quinic acid quinic acid (kwin´ik)

l-quinic acid; 1,3,4,5-tetrahydroxycyclohexanecarboxylic acid;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.a. forms a gamma-lactone upon heating.chinic acid, kinic acid;

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

beta-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.conquinine;
q. polygalacturonate a salt of quinidine that may be used in place of quinidine sulfate; antiarrhythmic agent. See q. sulfate. See also quinidine.
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 quinidine.

quinine quinine (kwI´nIn, -nen, kwin´-In, -en)

C₂₀H₂₄N₂O₂3H₂O;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. carbacryclic resin See 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-)

cinchonism

Quinlan's test Quinlan's test

See under test.

quino- quino-

See quin-.

quinocide hydrochloride quinocide hydrochloride (kwin´o-sId)

8-(4-Aminopentylamino)-6-methoxyquinoline hydrochloride;an antimalarial comparable to primaquine in effectiveness and scope.

quinol quinol (kwin´ol)

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.chinoleine, leucoline; 2. A class of alkaloids base on the q. (1) structure.

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

2,3-Pyridinedicarboxylic acid;a catabolite of l-tryptophan and a precursor of NAD⁺.

quinolinol quinolinol (kwin-ol´in-ol)

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.

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. 1,4-benzoquinone (1)
q. reductase NADPH dehydrogenase (quinone)

quinovose quinovose (kwin´o-vos)

d-epirhamnose

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

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

quinquetubercular quinquetubercular (kwin´kwe-tu-ber´kyu-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)

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

quinquina quinquina (kwin-kwi´na)

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 (QNB) quinuclidinyl benzilate (QNB) (kwin-u´-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 -H3 -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 dissoled 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.

quittor quittor (kwit´or)

A fistulous tract leading from the coronet to the lateral cartilage of the horse, due to an injury, followed by bacterial infection and later by massive necrosis of cartilage and other tissues; the necrotic process may involve the joint capsule. [ME. quetaur, a boiling]

quodque (q) 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. 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's q. Ayala's index
cognitive laterality q. (CLQ) test for difference in cognitive performance of left and right sides of the brain.
growth q. the fractional part or percentage of the entire food energy which is utilized for growth in the young animal.
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 his 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 which 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. 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.respiratory coefficient;
spinal q. Ayala's index

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

Abbreviation for quoties opus sit, as often as necessary. [L.]

q.v. q.v.

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