Q

Q Q ubiquinone.

Q₁₀ Q₁₀ ubiquinone.

q q the long arm of a chromosome.

q.d. qd [L.] quaque die (every day) (on the JCA- HO “Do Not Use” List).

q.h. qh [L.] quaque hora (every hour). qi qi [Chinese] chi or ch’i; one of the basic substances that according to traditional Chinese medicine pervade the body; a subtle influence or vital energy that is the cause of most physiologic processes and whose proper balance is necessary for maintaining health.

q.i.d. qid [L.] quater in die (four times a day).

qi gong qi gong [Chinese] qi cultivation, a broad range of practices, incorporating meditation, movement exercises, and breath control, whose purpose is to manipulate and develop qi, and ranging in application from the meditative systems of spiritual practitioners to medical practice to the martial arts.

q.s. qs [L.] quantum satis (sufficient quantity).

q-sort q-sort a technique of personality assessment in which the subject (or an observer) indicates the degree to which a standardized set of descriptive statements applies to the subject.

quack charlatan one who misrepresents their ability and experience in diagnosis and treatment of disease or effects to be achieved by their treatment.

quackery charlatanisme the practice or methods of a quack.

quadrant quadrant 1. one fourth of the circumference of a circle. 2. one of four corresponding parts, or quarters, as of the surface of the abdomen or of the field of vision.

quadrantanopia quadranopsie defective vision or blindness in one fourth of the visual field.

quadrantectomy quadrantectomie a form of partial mastectomy involving en bloc excision of tumor in one quadrant of breast tissue, as well as the pectoralis major muscle fascia and overlying skin.

quadrate carré square or squared.

quadri- quadri- word element [L.], four.

quadriceps quadriceps having four heads.

quadrigeminal 1. quadrijumeau fourfold; in four parts; forming a group of four. 2. quadrigéminal pertaining to the corpora quadrigemina.

quadrigeminy 1. quadrigéminisme occurrence in fours. 2. the occurrence of four beats of the pulse followed by a pause.

quadripara quadripare a woman who has had four pregnancies that resulted in viable offspring; para IV.

quadriplegia quadriplégie paralysis of all four limbs.

quadriplegic quadriplégique 1. of, pertaining to, or characterized by quadriplegia. 2. an individual with quadriplegia.

quadritubercular quadrituberculaire having four tubercles or cusps.

quadruped quadrupède 1. four-footed. 2. an animal having four feet. Adj.: quadrupedal.

quadruplet quadruplé one of four offspring produced at one birth.

qualitative qualitatif pertaining to quality. Cf. quantitative.

quantitative quantitatif 1. denoting or expressing a quantity. 2. relating to the proportionate quantities or to the amount of the constituents of a compound.

quantum quantum pl. quanta [L.] a unit of measure under the quantum theory (q.v.).

quarantine quarantaine 1. restriction of freedom of movement of apparently well individuals who have been exposed to infectious disease, which is imposed for the maximal incubation period of the disease.2. quarantine period. 3. the place where persons are detained for inspection. 4. to detain or isolate on account of suspected contagion.

quart pinte one fourth of a gallon; in the United States it is 0.946 liter and in Great Britain (imperial quart) it is 1.14 liters.

quartan quarte recurring in four-day cycles.

quartz quartz a crystalline form of silica (silicon dioxide).

quasidominance quasidominance the mimicking of dominance in inheritance, caused by mating of a carrier of a recessive gene with an individual homozygous for the gene. Adj.: quasidominant.

quaternary quaternaire 1. fourth in order. 2. containing four elements or groups.

quazepam quazépam a benzodiazepine used as a sedative and hypnotic in the treatment of insomnia.

quenching refroidissement 1. suppressing or diminishing a physical property, as of heat in a metal by immersion in cold liquid. 2. quenching decrease of fluorescence from an excited molecule by other molecules that absorb some emission energy that would otherwise occur as light. 3. quenching in liquid scintillation counting, interference with fluorescence generation or propagation, decreasing the counting efficiency. 4. coupage the termination of secondary and subsequent ionizations in a detector to give it time to become sensitive again.

quetiapine quétiapine a serotonin and dopamine antagonist used as the fumarate salt as an antipsychotic.

quickening premiers mouvements du fœtus the first perceptible movement of the fetus in the uterus.

quinacrine quinacrine an antimalarial, antiprotozoal, and anthelmintic, used as the hydrochloride salt, especially for suppressive therapy of malaria and in the treatment of giardiasis and tapeworm infestations.

quinapril quinapril an angiotensin-converting enzyme inhibitor used as the hydrochloride salt in the treatment of hypertension and congestive heart failure.

quinethazone quinéthazone a diuretic used in the treatment of edema and hypertension.

quinidine quinidine the dextrorotatory isomer of quinine, used in the form of the gluconate, polygalacturonate, and sulfate salts in the treatment of cardiac arrhythmias; also used in the treatment of severe falciparum malaria.

quinine quinine an alkaloid of cinchona that was once widely used to control and prevent malaria; it also has analgesic, antipyretic, mild oxytocic, cardiac depressant, and sclerosing properties, and it decreases the excitability of the motor end plate. It is used as the dihydrochloride, hydrochloride, or sulfate salt in the treatment of resistant falciparum malaria.

quininism quininisme cinchonism.

quinolone quinolone any of a group of synthetic antibacterial agents that includes nalidixic acid and the fluoroquinolones.

quinone quinone any of a group of highly aromatic compounds derived from benzene or from multiple ring hydrocarbons and containing two ketone group substitutions; they are subclassified on the basis of ring structure (i.e., anthraquinone, benzoquinone) and are mild oxidizing agents. Often used specifically to denote benzoquinone, particularly 1, 4-benzoquinone.

quinsy angine phlegmoneuse peritonsillar abscess.

quint- quint- word element [L.], five.

quintan quintane recurring every fifth day, as a fever.

quintipara quintipare a woman who has had five pregnancies that resulted in viable offspring; para V.

quintuplet quintuplé one of five offspring produced at one birth.

quinupristin quinupristine a semisynthetic antibacterial used in conjunction with dalfopristin against various gram-positive organisms, including vancomycin-resistant Enterococcus faecium.

quotidian quotidien recurring every day; see malaria.

quotient quotient a number obtained by division. achievement q. q. de rendement the achievement age divided by the mental age, indicating progress in learning. caloric q. q. calorique the heat evolved (in calories) divided by the oxygen consumed (in milligrams) in a metabolic process. intelligence q. q. intellectuel a measure of intelligence obtained by dividing the mental age by the chronological age and multiplying the result by 100. respiratory q. (RQ) q. respiratoire the ratio of the volume of carbon dioxide given off by the body tissues to the volume of oxygen absorbed by them; usually equal to the corresponding volumes given off and taken up by the lungs.

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