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20-letter words containing s, g, r

  • broadcasting station — a television or radio station
  • brown lung (disease) — a chronic disease of the lungs caused by inhalation of fine textile fibers, esp. cotton; byssinosis
  • carl friedrich gauss — (person)   A German mathematician (1777 - 1855), one of all time greatest. Gauss discovered the method of least squares and Gaussian elimination. Gauss was something of a child prodigy; the most commonly told story relates that when he was 10 his teacher, wanting a rest, told his class to add up all the numbers from 1 to 100. Gauss did it in seconds, having noticed that 1+...+100 = 100+...+1 = (101+...+101)/2. He did important work in almost every area of mathematics. Such eclecticism is probably impossible today, since further progress in most areas of mathematics requires much hard background study. Some idea of the range of his work can be obtained by noting the many mathematical terms with "Gauss" in their names. E.g. Gaussian elimination (linear algebra); Gaussian primes (number theory); Gaussian distribution (statistics); Gauss [unit] (electromagnetism); Gaussian curvature (differential geometry); Gaussian quadrature (numerical analysis); Gauss-Bonnet formula (differential geometry); Gauss's identity (hypergeometric functions); Gauss sums (number theory). His favourite area of mathematics was number theory. He conjectured the Prime Number Theorem, pioneered the theory of quadratic forms, proved the quadratic reciprocity theorem, and much more. He was "the first mathematician to use complex numbers in a really confident and scientific way" (Hardy & Wright, chapter 12). He nearly went into architecture rather than mathematics; what decided him on mathematics was his proof, at age 18, of the startling theorem that a regular N-sided polygon can be constructed with ruler and compasses if and only if N is a power of 2 times a product of distinct Fermat primes.
  • case based reasoning — (artificial intelligence)   (CBR) A technique for problem solving which looks for previous examples which are similar to the current problem. This is useful where heuristic knowledge is not available. There are many situations where experts are not happy to be questioned about their knowledge by people who want to write the knowledge in rules, for use in expert systems. In most of these situations, the natural way for an expert to describe his or her knowledge is through examples, stories or cases (which are all basically the same thing). Such an expert will teach trainees about the expertise by apprenticeship, i.e. by giving examples and by asking the trainees to remember them, copy them and adapt them in solving new problems if they describe situations that are similar to the new problems. CBR aims to exploit such knowledge. Some key research areas are efficient indexing, how to define "similarity" between cases and how to use temporal information.
  • casing head pressure — The casing head pressure is the pressure on the casing, which is measured at the wellhead.
  • cassegrain telescope — an astronomical reflecting telescope in which incident light is reflected from a large concave paraboloid mirror onto a smaller convex hyperboloid mirror and then back through a hole in the concave mirror to form the image
  • centrifugal spinning — the spinning of rayon filaments in a centrifugal box.
  • change a reservation — If you change a reservation, you move a booking to a different date because someone who has booked a room has informed you that they wish to stay there on a different date.
  • change-speed gearbox — A change-speed gearbox is a set of movable or constant gears which allows the speed ratio between input and output shafts to be changed either manually or automatically.
  • child support agency — the British government agency concerned with the welfare of children
  • child-abuse register — (in Britain) a list of children deemed to be at risk of abuse or injury from their parents or guardians, compiled and held by a local authority, area health authority, or NSPCC Special Unit
  • cleansing department — the department of a local authority that collects refuse
  • climbing bittersweet — bittersweet (def 4).
  • climbing-bittersweet — Also called woody nightshade. a climbing or trailing plant, Solanum dulcamara, of the nightshade family, having small, violet, star-shaped flowers with a protruding yellow center and scarlet berries.
  • college of cardinals — the collective body of cardinals having the function of electing and advising the pope
  • commissioning editor — a person who commissions authors to write books and magazine articles
  • compensatory damages — sum paid for a loss
  • complementary angles — either of two angles that added together produce an angle of 90°.
  • composite photograph — a photograph formed by superimposing two or more separate photographs
  • compression ignition — ignition of engine fuel by the heat of air compressed in the cylinders into which the fuel is introduced.
  • computer typesetting — a system for the high-speed composition of type by a device driven by punched paper tape or magnetic tape that has been processed by a computer
  • confectioners' sugar — Confectioners' sugar is very fine white sugar that is used for making icing and candy.
  • congressional record — (in the US) the government journal that publishes all proceedings of Congress
  • congressman-at-large — (in the US) a member of the House of Representatives who was elected by the voters of an entire state as opposed to the voters of a single Congressional district
  • contempt of congress — contempt of a U.S. Congressional body, as of an investigating committee, shown by a witness summoned or appearing before it.
  • continental congress — the assembly of delegates from the North American rebel colonies held during and after the War of American Independence. It issued the Declaration of Independence (1776) and framed the Articles of Confederation (1777)
  • contradistinguishing — Present participle of contradistinguish.
  • controlling interest — a quantity of shares in a business that is sufficient to ensure control over its direction
  • convective discharge — the repulsion of ions of a gas by a highly charged body, creating a discernible wind.
  • corresponding angles — a pair of nonadjacent angles, one interior and one exterior, on the same side of a transversal: these paired angles are equal if the lines cut by the transversal are parallel
  • crime against nature — Law. sodomy.
  • criminal proceedings — action taken in a court to bring a criminal prosecution against someone
  • cross-country skiing — the activity of skiing across open country for pleasure
  • cutting-out scissors — a type of scissors used to cut out pieces of fabric for sewing
  • cylinder head gasket — (in an automobile engine) a gasket placed between the cylinder and the cylinder heads to avoid leaks of coolant and compression
  • de facto segregation — racial, ethnic, or other segregation resulting from societal differences between groups, as socioeconomic or political disparity, without institutionalized legislation intended to segregate.
  • descriptive geometry — the study of the projection of three-dimensional figures onto a plane surface
  • differential housing — the casing that houses the differential of a motor vehicle
  • digital data service — (communications)   (DDS) The class of service offered by telecommunications companies for transmitting digital data as opposed to voice.
  • digital service unit — data service unit
  • directory user agent — (DUA) The software that accesses the X.500 Directory Service on behalf of the directory user. The directory user may be a person or another software element.
  • disciplinary hearing — a hearing at which the conduct of a member of an organization, profession etc is examined and a punishment may be handed down
  • dispersion hardening — the strengthening of an alloy as a result of the presence of fine particles in the lattice
  • disruptive discharge — the sudden, large increase in current through an insulating medium resulting from complete failure of the medium under electrostatic stress.
  • district court judge — a judge presiding over a lower court
  • district high school — a school in a rural area that includes primary and post-primary classes
  • drug delivery system — A drug delivery system is a system that is used as a medium or carrier for administering a pharmaceutical product to a patient.
  • drum and bugle corps — a marching band of drum players and buglers.
  • early modern english — the English language represented in printed documents of the period starting with Caxton (1476) and ending with Dryden (1700).
  • early sunday morning — a painting (1930) by Edward Hopper.
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