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18-letter words containing t, u, n, d, r

  • orthotungstic acid — an oxyacid acid of tungsten. Formula: H2WO4
  • paediatric nursing — the branch of nursing concerned with the care of children
  • parallel reduction — A form of applicative order reduction in which all redexes in an expression are reduced simultaneously. Variants include parallel outermost reduction and lenient reduction. See normal order reduction.
  • paraurethral gland — any of a group of vestigial glands located in the posterior wall of the urethra in women.
  • pass the hat round — to collect money, as for a cause
  • passing-out parade — a ceremonial parade of cadets who have completed their training
  • perceptual defence — the process by which it is thought that certain stimuli are either not perceived or are distorted due to their offensive, unpleasant, or threatening nature
  • perpetual calendar — a calendar devised to be used for many years, as in determining the day of the week on which a given date falls.
  • piperonyl butoxide — a light-brown liquid, C 1 9 H 3 0 O 5 , used chiefly as a synergist in certain insecticides.
  • pitch-and-run shot — chip shot.
  • point of departure — Nautical. the precise location of a vessel, established in order to set a course, especially in beginning a voyage in open water.
  • population pyramid — a graph showing the distribution of a population by sex, age, etc.
  • pour cold water on — If someone pours cold water on a plan or idea, they criticize it so much that people lose their enthusiasm for it.
  • predation pressure — the effect of predation upon a population, resulting in the decrease in size of that population.
  • prepare the ground — make conditions ready
  • presidential suite — a suite of rooms, as in a hotel, suitable for a president or other head of state.
  • product acceptance — the verification or acceptance that a manufactured item meets required specifications or standards and is usable for its purpose
  • production company — an organization which produces, films, plays, television or radio programmes
  • production control — the planning and supervision of manufacturing activities to ensure that goods will be produced on time at the lowest possible cost.
  • production manager — a supervisor of the budget, crew and other details in the production of a film or play
  • productivity bonus — an extra payment made to workers for being more productive or yielding more favourable results than normal
  • prometheus unbound — a drama in verse (1820) by Shelley.
  • protocol data unit — (PDU) A packet of data passed across a network. The term implies a specific layer of the OSI seven layer model and a specific protocol.
  • pseudo-anarchistic — a person who advocates or believes in anarchy or anarchism.
  • public expenditure — spending by central government, local authorities, and public corporations
  • put your foot down — If someone puts their foot down, they use their authority in order to stop something happening.
  • pyramus and thisbe — (in Greek legend) two lovers of Babylon: Pyramus, wrongly supposing Thisbe to be dead, killed himself and she, encountering him in his death throes, did the same
  • quadratic equation — an equation containing a single variable of degree 2. Its general form is ax 2 + bx + c = 0, where x is the variable and a, b, and c are constants (a ≠ 0).
  • quartz-iodine lamp — a type of tungsten-halogen lamp containing small amounts of iodine and having a quartz envelope, operating at high temperature and producing an intense light for use in car headlamps, etc
  • quinacrine mustard — a nitrogen mustard derived from mepacrine and used as a stain for chromosomes
  • radiation exposure — exposure to radiant energy or to the particles emitted in the transfer of radiant energy, esp the particles and gamma rays emitted in nuclear decay; exposure to radioactive substances
  • radiation pressure — the pressure exerted on a surface by electromagnetic radiation or by sound waves.
  • radiocommunication — communication by means of radio waves
  • radius of gyration — the distance from an axis at which the mass of a body may be assumed to be concentrated and at which the moment of inertia will be equal to the moment of inertia of the actual mass about the axis, equal to the square root of the quotient of the moment of inertia and the mass.
  • reduction division — the first division of meiosis in which the number of chromosomes is reduced to half the original number.
  • reduction strategy — (theory)   An algorithm for deciding which redex(es) to reduce next. Different strategies have different termination properties in the presence of recursive functions or values. See string reduction, normal order reduction, applicative order reduction, parallel reduction
  • redundancy payment — a sum of money given by an employer to an employee who has been made redundant: usually calculated on the basis of the employee's rate of pay and length of service
  • repayment schedule — a document detailing the specific terms of a borrower's loan, such as monthly payment, interest rate, due dates etc
  • reproduction proof — repro proof.
  • residual magnetism — remanence.
  • return to the fold — come back home
  • run length limited — (storage)   (RLL) The most popular scheme for encoding data on magnetic disks. RLL packs up to 50% more data on a disk than MFM. Groups of bits are mapped to specific patterns of flux. The density of flux transitions is limited by the spatial resolution of the disk and frequency response of the head and electronics. However, transitions must be close enough to allow reliable clock recovery. RLL implementations vary according to the minimum and maximum allowed numbers of transition cells between transitions. For example, the most common variant today, RLL 1,7, can have a transition in every other cell and must have at least one transition every seven cells. The exact mapping from bits to transitions is essentially arbitrary. Other schemes include GCR, FM, Modified Frequency Modulation (MFM). See also: PRML.
  • runge-kutta method — a numerical method, involving successive approximations, used to solve differential equations.
  • russian federation — a republic extending from E Europe to N and W Asia. 6,593,000 sq. mi. (17,076,000 sq. km). Capital: Moscow.
  • saturated solution — A saturated solution is a solution in which there is so much solute that if there was any more, it would not dissolve.
  • scottish deerhound — one of a Scottish breed of large, tall hunting dogs having a medium-length, wiry, gray or reddish-fawn coat, originally developed for hunting and bringing down deer, and known as the royal dog of Scotland.
  • second triumvirate — the coalition and joint rule of the Roman Empire by Antony, Lepidus, and Octavian, begun in 43 bc
  • secondary industry — manufacturing, services, etc.
  • self-understanding — mental process of a person who comprehends; comprehension; personal interpretation: My understanding of the word does not agree with yours.
  • shift one's ground — to change one's argument or defense
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