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17-letter words containing p, a, n, t

  • operation sealion — the codename for Hitler's proposed invasion (1940) of Great Britain
  • operations centre — a centre where activities of a business, organization, etc, are administrated and take place
  • opisthobranchiate — (zoology) Of or pertaining to the Opisthobranchiata.
  • opportunistically — adhering to a policy of opportunism; practicing opportunism.
  • optical astronomy — the branch of observational astronomy using telescopes to observe or photograph celestial objects in visible light.
  • optical carrier n — (networking)   (OC-n) A SONET rate of n times 51.84 megabits per second.
  • optical computing — (hardware)   (Or "Optical Signal Processing") Operating on data represented using electromagnetic radiation, e.g. visible light, instead of the electrical signals used in a conventional electronic digital computer. Electronic digital computers are built from transistors. These form components that store data and logic gates that perform the low-level Boolean operations such as AND, OR and NOT that are the basis of all digital computation. The optical equivalent requires material with a non-linear refractive index such that light beams can interact with each other to perform the same Boolean operations. Though the photons that carry optical signals offer some theoretical advantages over the electrons that carry electronic signals, there are many practical problems that would have to be overcome before optical computing could compete in terms of cost, power and speed.
  • organ-pipe cactus — a treelike or columnar cactus, Lemaireocereus marginatus, of Mexico, having a central, erect spine surrounded by spreading spines in clusters of five to eight, and funnel-shaped, brownish-purple flowers.
  • over-appreciation — gratitude; thankful recognition: They showed their appreciation by giving him a gold watch.
  • over-compensation — a pronounced striving to neutralize and conceal a strong but unacceptable character trait by substituting for it an opposite trait.
  • pacific northwest — the region of North America lying north of the Columbia River and west of the Rockies
  • painted greenling — a greenling, Oxylebius pictus, inhabiting the Pacific coastal waters of North America, having a whitish body marked with black bands.
  • pair annihilation — Physics. annihilation (def 3a).
  • palace revolution — a challenge to or overthrow of a sovereign or other leader by members of the ruling family or group.
  • palaeoethnobotany — the study of fossil seeds and grains to further archaeological knowledge, esp of the domestication of cereals
  • paleoanthropology — the study of the origins and predecessors of the present human species, using fossils and other remains.
  • paleoconservative — a person advocating an older, traditional type of conservatism, especially in politics.
  • palette of narmer — a king of Egypt identified by modern scholars as the Menes of tradition and depicted as the unifier of Upper and Lower Egypt on an ancient slate tablet (Narmer Palette or Palette of Narmer) c3200 b.c. with relief carvings on both sides.
  • pan and tilt head — a mounting device on which a camera may be rotated in a horizontal plane (pan) or in a vertical plane (tilt)
  • pan potentiometer — a control on a stereo sound mixing desk by means of which the relative levels in right- and left-hand channels can be adjusted and hence the apparent position of the recorded or broadcast sound source within the stereo panorama can be controlled
  • papanicolaou test — Pap test.
  • parachute payment — a payment made to alleviate hardship resulting from a sudden loss of income
  • paralysis agitans — Parkinson's disease
  • parathyroid gland — any of several small oval glands usually lying near or embedded in the thyroid gland.
  • paratungstic acid — an oxyacid acid of tungsten. Formula: H10W12O14
  • parents anonymous — (in Britain) an association of local voluntary self-help groups offering help through an anonymous telephone service to parents who fear they will injure their children, or who have other problems in managing their children
  • parking attendant — a person who works for a traffic control agency and who issues tickets for parking violations
  • parliamentary law — the body of rules, usages, and precedents that governs proceedings of legislative and deliberative assemblies.
  • particle kinetics — Particle kinetics is the study of the movement of particles and the forces that cause this movement.
  • particularization — to make particular.
  • parts of kesteven — an area in E England constituting a former administrative division of Lincolnshire
  • parts per million — the number of units (of a substance) present in a million units of another substance
  • pascal's triangle — a triangular arrangement of the binomial coefficients of the expansion (x + y) n for positive integral values of n.
  • pashmina politics — the adoption of political policies immediately after they have gone out of fashion
  • passenger station — a station used by passengers
  • passenger traffic — number of passengers
  • passive restraint — a safety device, as an air bag or special seat belt, that is activated automatically to protect an automobile passenger at the moment of impact when a collision occurs.
  • pasteur institute — an organization in Paris that was founded in 1887. It does research on micro-organisms and diseases
  • pasteur treatment — Pasteur's method of preventing certain diseases, esp. rabies, by increasing the strength of successive inoculations with a specific weakened or attenuated virus
  • pastoral symphony — the Symphony No. 6 in F major (1807–08) by Ludwig van Beethoven.
  • paternalistically — the system, principle, or practice of managing or governing individuals, businesses, nations, etc., in the manner of a father dealing benevolently and often intrusively with his children: The employees objected to the paternalism of the old president.
  • paymaster general — a government minister responsible for making payments by government departments
  • peak viewing time — the time at which the largest numbers of the population are watching television
  • penalty shoot-out — In football, a penalty shoot-out is a way of deciding the result of a game that has ended in a draw. Players from each team try to score a goal in turn until one player fails to score and their team loses the game.
  • penitential psalm — any of the Psalms (the 6th, 32nd, 38th, 51st, 102nd, 130th, and 143rd) that give expression to feelings of penitence and that are used in various Christian liturgical services.
  • pentachlorophenol — a white, crystalline, water-insoluble powder, C 6 Cl 5 OH, used chiefly in fungicides, disinfectants, and wood preservatives.
  • pentylenetetrazol — a white, crystalline, bitter-tasting, water-soluble powder, C 6 H 1 0 N 4 , used as a respiratory and circulatory stimulant, especially in the treatment of barbiturate poisoning, and to induce a convulsive state in the treatment of certain mental diseases.
  • per capita income — the total income of an area or country divided by the number of people in that area or country
  • per procurationem — by one acting as an agent; by proxy.
  • perforation gauge — a marked ruler used to measure the number of perforations per unit length along the borders of a stamp.
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