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20-letter words containing a, d, i, s

  • biological diversity — Biological diversity is the same as biodiversity.
  • bird-footed dinosaur — theropod.
  • black lung (disease) — a disease of the lungs caused by the inhalation of coal dust; anthracosis
  • blue ridge mountains — a mountain range in the eastern US, extending from West Virginia into Georgia: part of the Appalachian mountains. Highest peak: Mount Mitchell, 2038 m (6684 ft)
  • board of supervisors — the governing body of a county in many U.S. states, especially in the Midwest and the East, consisting of from 15 to 100 members elected from towns, townships, cities, or wards.
  • bomb disposal expert — an expert in bomb disposal
  • bone mineral density — a measurement of the amount of calcium and other minerals in a segment of bone, a higher mineral content indicating a higher bone density and strength, used to detect osteoporosis or monitor its treatment.
  • bouvier des flandres — any of a breed of large, strong dog with a rough, wiry coat and pointed, erect ears
  • breadth-first search — (algorithm)   A graph search algorithm which tries all one-step extensions of current paths before trying larger extensions. This requires all current paths to be kept in memory simultaneously, or at least their end points. Opposite of depth-first search. See also best first search.
  • breakfast and dinner — Breakfast and dinner is a system of accommodations in a hotel or guest house, in which you pay for a room and breakfast and dinner the following day.
  • brittle bone disease — bone disorder
  • broadcast journalism — journalism as practiced in radio and television.
  • broadcasting station — a television or radio station
  • broaden o's/the mind — If an experience broadens your mind, it makes you more willing to accept other people's beliefs and customs.
  • brown lung (disease) — a chronic disease of the lungs caused by inhalation of fine textile fibers, esp. cotton; byssinosis
  • by fits (and starts) — in an irregular way; in bursts of activity followed by periods of inactivity
  • can do sth blindfold — If you say that you can do something blindfold, you are emphasizing that you can do it easily, for example because you have done it many times before.
  • 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.
  • cartesian coordinate — Usually, Cartesian coordinates. a member of a system of coordinates for locating a point on a plane (Cartesian plane) by its distance from each of two intersecting lines, or in space by its distance from each of three planes intersecting at a point.
  • 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.
  • cat's-tail speedwell — a widely cultivated Eurasian plant, Veronica spicata, of the figwort family, having blue flowers in long, spikelike clusters.
  • catherine de medicis — (Caterina de' Medici) 1518–89, queen of Henry II of France (mother of Francis II, Charles IX, and Henry III).
  • cavendish experiment — the experiment, conducted by Henry Cavendish, that determined the constant of gravitation by using a torsion balance and measuring the torsion produced by two masses placed at given distances from the masses on the balance.
  • central bedfordshire — a unitary authority of S central England. Pop: 252 100 (2007 est). Area: 712 sq km (275 sq miles)
  • chapter of accidents — a series of misfortunes
  • 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
  • childhood sweetheart — a boyfriend or girlfriend from an early stage of life
  • cleansing department — the department of a local authority that collects refuse
  • codex juris canonici — the official code of canon law in force in the Roman Catholic Church; introduced in 1918 and revised in 1983
  • cognitive dissonance — an uncomfortable mental state resulting from conflicting cognitions; usually resolved by changing some of the cognitions
  • college of cardinals — the collective body of cardinals having the function of electing and advising the pope
  • colloidal suspension — a mixture having particles of one component, with diameters between 10 −7 and 10 −9 metres, suspended in a continuous phase of another component. The mixture has properties between those of a solution and a fine suspension
  • combination sandwich — a big sandwich with a mixed filling
  • complaints procedure — a prescribed method of lodging a complaint to an institution
  • condensation nucleus — nucleus (def 5).
  • congressional record — (in the US) the government journal that publishes all proceedings of Congress
  • conservative judaism — a movement reacting against the radicalism of Reform Judaism, rejecting extreme change and advocating moderate relaxations of traditional Jewish law, by an extension of the process by which its adherents claim traditional Orthodox Judaism evolved
  • contradistinguishing — Present participle of contradistinguish.
  • convective discharge — the repulsion of ions of a gas by a highly charged body, creating a discernible wind.
  • copulative asyndeton — a staccato effect produced by omitting copulative connectives between two or more items in a group, as in “Friends, Romans, countrymen.”.
  • 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
  • counterdemonstration — a demonstration that is held in reaction to another demonstration
  • crime and punishment — a novel (1866) by Feodor Dostoevsky.
  • criminal proceedings — action taken in a court to bring a criminal prosecution against someone
  • criminal syndicalism — the doctrine of recourse to acts of violence or terrorism, or the advocacy of such acts, as a means of effecting economic or political change: proscribed by statute in many U.S. states.
  • crossword dictionary — a dictionary that lists common clues found in crossword puzzles with potential answer words. In books, the lists are usually sorted by the number of letters in the answer, while an online crossword dictionary, such as the Dictionary.com Crossword Solver, is able to analyze queries electronically, examining either the clue or the number and pattern of letters already filled in to arrive at suggested answers.
  • cycloidal propulsion — propulsion of a vessel by propellers of controllable pitch that steer as well as propel.
  • cylinder head gasket — (in an automobile engine) a gasket placed between the cylinder and the cylinder heads to avoid leaks of coolant and compression
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