| quaternary | 1. Fourth in order. 2. Containing four elements or groups. Origin: L. Quaternarius, from quattuor = four (18 Nov 1997) |
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| 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 | 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 he loaded his sentences." (Sir W. Scott) 3. A word of four syllables; a quadrisyllable. 4. <mathematics> The quotient of two vectors, or of two directed right lines in space, considered as depending on four geometrical elements, and as expressible by an algebraic symbol of quadrinomial form. The science or calculus of quaternions is a new mathematical method, in which the conception of a quaternion is unfolded and symbolically expressed, and is applied to various classes of algebraical, geometrical, and physical questions, so as to discover theorems, and to arrive at the solution of problems. Origin: L. Quaternio, fr.quaterni four each. See Quaternary. Source: Websters Dictionary (01 Mar 1998) |
| Quatrefages de Breau | Jean L.A. De, French naturalist, 1810-1892. See: Quatrefages' angle. (05 Mar 2000) |
| Quatrefages' 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) |
| quean | 1. A woman; a young or unmarried woman; a girl. 2. A low woman; a wench; a slut. "The dread of every scolding quean." Origin: Originally, a woman, AS. Cwene; akin to OS. Quena, OHG. Quena, Icel. Kona, Goth qin, and AS. Cwen, also to Gr. Woman, wife, Skr. Gna goddess. Cf. Queen. Source: Websters Dictionary (01 Mar 1998) |
| queasy | 1. Sick at the stomach; affected with nausea; inclined to vomit; qualmish. 2. Fastidious; squeamish; delicate; easily disturbed; unsettled; ticklish. " A queasy question." "Some seek, when queasy conscience has its qualms." (Cowper) Origin: Icel. Kweisa pain; cf. Norw. Kveis sickness after a debauch. Source: Websters Dictionary (01 Mar 1998) |
| 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) |
| quebec group | <geology> The middle of the three groups into which the rocks of the Canadian period have been divided in the American Lower Silurian system. Source: Websters Dictionary (01 Mar 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. Origin: Sp. Source: Websters Dictionary (01 Mar 1998) |
| quebrith | <chemistry> Sulphur. Origin: OE. Quebrit, quibrith, Ar. Kibrit. Source: Websters Dictionary (01 Mar 1998) |
| quasispecies |
a substrain of an organism that develops within an individual by the process of evolutionary selection.
출처: www.aegis.com/pubs/beta/1999/BE991221.html
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| quantitative |
Something you can give meaning or value to by giving it a number, such as pregnancy rate. See also risk. Opposite to qualitative.
출처: www.jansen.com.au/Dictionary_PR.html
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| quadrangle |
a four sided-shape; the shape of most Spanish missions.
출처: www.nps.gov/prsf/history/glossary.htm
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| quantitative computed tomography |
a type of x-ray that uses a computer to measure bone density of the spine (central QCT); can also be used to measure bone density at the wrist (peripheral QCT).
출처: www.womenandinfants.com/body.cfm
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| quantitative ultrasound |
a test that uses sound waves to measure bone density in the heel, shinbone, and kneecap
출처: www.womenandinfants.com/body.cfm
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| q | an adequate or large amount |
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| q | something that has a magnitude and can be represented in mathematical expressions by a constant or a variable |
| q | a measure of the quantity of electricity (determined by the amount of an electric current and the time for which it flows) |
| q | the act of dividing into quanta or expressing in terms of quantum theory |
| q | physics: apply quantum theory to |
| q | telecommunications: approximate (a signal varying continuously in amplitude) by one whose amplitude is restricted to a prescribed set of discrete values |
| q | (physics) of or relating to a quantum or capable of existing in only one of two states |
| q | red Australian fruit |
| q | how much there is of something that you can measure |
| q | (physics) the smallest quantity of some physical property that a system can possess (according to quantum theory) |
| q | a theory of strong interactions between elementary particles (including the interaction that binds protons and neutrons in the nucleus) |
| q | a relativistic quantum theory of the electromagnetic interactions of photons and electrons and muons |