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19-letter words containing e, a, r, t

  • public-interest law — a branch of law that often utilizes class-action suits to protect the interest of a large group or of the public at large, as in matters relating to racial discrimination, air pollution, etc.
  • puncture repair kit — set of tools for patching a bicycle tyre
  • put a figure on sth — When you put a figure on an amount, you say exactly how much it is.
  • pyrenees-orientales — a department in S France. 1600 sq. mi. (4145 sq. km). Capital: Perpignan.
  • pythagoras' theorem — (spelling)   It's Pythagoras's Theorem.
  • pythagorean theorem — Pythagoras's Theorem
  • quantum electronics — the application of quantum mechanics and quantum optics to the study and design of electronic devices
  • quartermaster corps — the branch of the U.S. Army responsible for supplying food, clothing, fuel, and equipment and for the operation of commissaries, laundries, etc.
  • queen street farmer — a businessman who runs a farm, often for a tax loss
  • queen's regulations — (in Britain and certain other Commonwealth countries when the sovereign is female) the code of conduct for members of the armed forces
  • quick-change artist — a person adept at changing from one thing to another, as an entertainer who changes costumes quickly during a performance.
  • radiation potential — the potential in volts that must be applied to an atom or molecule to cause it to emit radiation at one of its characteristic frequencies.
  • radioactive fallout — the settling to the ground of airborne particles ejected into the atmosphere from the earth by explosions, eruptions, forest fires, etc., especially such settling from nuclear explosions (radioactive fallout) Compare rainout.
  • radiopharmaceutical — any of a number of radioactive drugs used diagnostically or therapeutically.
  • radius of curvature — the absolute value of the reciprocal of the curvature at a point on a curve.
  • rake over the coals — a black or dark-brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Compare anthracite, bituminous coal, lignite.
  • rap on the knuckles — a mild reprimand or light sentence
  • rapture of the deep — nitrogen narcosis.
  • rate of penetration — The rate of penetration is the speed with which a drill bit can break the rock under it.
  • rayleigh scattering — the scattering of light by particles that are very small in relation to the wavelength of the light, and in which the intensity of the scattered light varies inversely with the fourth power of the wavelength.
  • reactive depression — depression occurring in response to some situational stress, as loss of one's job.
  • reactor temperature — The reactor temperature is the temperature at various stages in a reactor in an FCC unit.
  • rebus sic stantibus — (of the duration of the binding force treaty) for as long as the relevant facts and circumstances remain basically the same.
  • reciprocity failure — a failure of the two exposure variables, light intensity and exposure time, to behave in a reciprocal fashion at very high or very low values
  • reconceptualization — to form into a concept; make a concept of.
  • recording secretary — an officer charged with keeping the minutes of meetings and responsible for the records.
  • recurrence relation — (mathematics)   An equation that defines each element of a sequence in terms of one or more earlier elements. E.g. The Fibonacci sequence, X[1] = 1 X[2] = 1 X[n] = X[n-1] + X[n-2] Some recurrence relations can be converted to "closed form" where X[n] is defined purely in terms of n, without reference to earlier elements.
  • redress the balance — to make a fair adjustment; see that justice is done
  • reduction potential — (in a galvanic cell) the potential of the electrode at which reduction occurs.
  • reef whitetip shark — whitetip shark (def 1).
  • reflux oesophagitis — inflammation of the gullet caused by regurgitation of stomach acids, producing heartburn: may be associated with a hiatus hernia
  • register allocation — (compiler, algorithm)   The phase of a compiler that determines which values will be placed in registers. Register allocation may be combined with register assignment. This problem can be shown to be isomorphic to graph colouring by relating values to nodes in the graph and registers to colours. Values (nodes) which must be valid simultaneously are linked by edges and cannot be stored in the same register (coloured the same). See also register dancing and register spilling.
  • register assignment — (compiler, algorithm)   The phase of a compiler that determines which register to use for each program value selected during register allocation.
  • registered disabled — on a local authority register under the Chronically Sick and Disabled Persons Act 1970
  • registration number — number on vehicle licence plate
  • reindustrialization — the revitalization of an industry or industrial society through government aid and tax incentives, modernization of factories and machinery, etc.
  • relational calculus — (database)   An operational methodolgy, founded on predicate calculus, dealing with descripitive expressions that are equivalent to the operations of relational algebra. Codd's reduction algorithm can convert from relational calculus to relational algebra. Two forms of the relational calculus exist: the tuple calculus and the domain calculus.
  • relational database — an electronic database comprising multiple files of related information, usually stored in tables of rows (records) and columns (fields), and allowing a link to be established between separate files that have a matching field, as a column of invoice numbers, so that the two files can be queried simultaneously by the user.
  • relational language — (language)   Any kind of programming language that specifies output in terms of some property and some arguments. For example, if Tom has two brothers, Dick and Harry, a relational language will respond to the query "Who is Tom's brother?" with either Dick or Harry. Notice that unlike functional languages, relational languages do not require a unique output for each predicate/argument pair. Prolog is the best known relational language.
  • relative complement — the set of elements contained in a given set that are not elements of another specified set.
  • relative impediment — a fact or circumstance that disqualifies from lawful marriage persons who are closely related.
  • relief organization — humanitarian group
  • religious education — religion as school subject
  • relocation expenses — Relocation expenses are a sum of money that a company pays to someone who moves to a new area in order to work for the company. The money is to help them pay for moving house.
  • removable cartridge — a hard disk enclosed in a case that can be removed from the disk drive, having more storage than floppy disks.
  • repeat prescription — A repeat prescription is a prescription for a medicine that you have taken before or that you use regularly.
  • representationalism — Also called representative realism. Epistemology. the view that the objects of perception are ideas or sense data that represent external objects, especially the Lockean doctrine that the perceived idea represents exactly the primary qualities of the external object.
  • republic of vietnam — the name (from 1955–75) for South Vietnam, as an independent republic, following the division of the country in 1954 into North Vietnam and South Vietnam
  • research laboratory — place for scientific experimentation
  • reserved occupation — in time of war, an occupation from which one will not be called up for military service
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