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18-letter words containing p, e, t, n, i

  • parallel importing — the importing of certain goods, esp pharmaceutical drugs, by dealers who undersell local manufacturers
  • 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.
  • parliamentarianism — advocacy of a parliamentary system of government.
  • partial evaluation — (compiler, algorithm)   (Or "specialisation") An optimisation technique where the compiler evaluates some subexpressions at compile-time. For example, Partial evaluation might change the termination properties of the program if, for example, the expression (x * 0) was reduced to 0 it would terminate even if x (and thus x * 0) did not. It may be necessary to reorder an expression to partially evaluate it, e.g. f x y = (x + y) + 1 g z = f 3 z If we rewrite f: f x y = (x + 1) + y then the expression x+1 becomes a constant for the function g and we can say g z = f 3 z = (3 + 1) + z = 4 + z Partial evaluation of built-in functions applied to constant arguments is known as constant folding. See also full laziness.
  • partial-vegetarian — a person who eats mostly plant foods, dairy products, and eggs, and occasionally chicken, fish, and red meat.
  • particeps criminis — an accomplice in a crime.
  • passing-out parade — a ceremonial parade of cadets who have completed their training
  • passive euthanasia — a form of euthanasia in which medical treatment that will keep a dying patient alive for a time is withdrawn
  • passive resistance — opposition to a government or to specific governmental laws by the use of noncooperation and other nonviolent methods, as economic boycotts and protest marches.
  • pattern bargaining — a collective bargaining technique in which contract terms in one settlement are used as models to be imposed on other negotiating parties within an industry.
  • payment in advance — If a business asks for payment in advance, the payment must be received in full before the goods or services are delivered.
  • peasant proprietor — a peasant who owns land, especially the land he or she tills.
  • pectoral sandpiper — an American sandpiper, Calidris melanotos, the male of which, when courting, inflates its chest conspicuously.
  • pedestrian traffic — the people coming and going on foot in a street, town, etc
  • pellitory of spain — a small Mediterranean plant, Anacyclus pyrethrum, the root of which contains an oil formerly used to relieve toothache: family Asteraceae (composites)
  • pennsylvania dutch — the descendants of 17th- and 18th-century settlers in Pennsylvania from southwest Germany and Switzerland.
  • pensioneer trustee — (in Britain) a person authorized by HMRC to oversee the management of a pension fund
  • people trafficking — the practice of bringing immigrants into a country illegally
  • peppermint camphor — menthol.
  • percentile ranking — the percentage of scores that a particular score is greater than
  • perceptual mapping — the use of a graph or map in the development of a new product, in which the proximity of consumers' images of the new product to those of an ideal product provide an indication of the new product's likely success
  • percussion section — orchestra, group: drums, etc.
  • perfect continuous — perfect progressive.
  • perfect contrition — sincere penitence or remorse.
  • performance artist — an artist that is involved in a theatrical presentation that incorporates various art forms, such as dance, sculpture, music, etc
  • periodic inventory — Periodic inventory is a method of valuing inventory, usually at the end of accounting periods, by physically counting all merchandise held in stock at that time.
  • perlocutionary act — the action of affecting someone by uttering certain words
  • permanent resident — an immigrant who has been given official residential status, often prior to being granted citizenship
  • persistent cruelty — conduct causing fear of danger to the life or health of a spouse (used in matrimonial proceedings before magistrates)
  • personal assistant — aide
  • personal exemption — Your personal exemption is the amount of money that is deducted from your gross income before you have to start paying income tax.
  • peters' projection — a form of modified world map projection that attempts to reflect accurately the relative surface areas of landmasses, an approach which gives greater prominence (than do standard representations) to equatorial countries
  • petroleum engineer — A petroleum engineer is an engineer who is involved in most stages of oil and gas field evaluation, development, and production, whose job is to maximize hydrocarbon recovery and reduce costs and environmental impact.
  • phanerocrystalline — (of a rock) having the principal constituents in the form of crystals visible to the naked eye.
  • phase-shift keying — (communications)   (PSK) A digital modulation scheme that conveys data by changing the phase of a carrier wave. The data can either determine the absolute phase relative to the unmodulated carrier or reference signal ("coherent phase-shift keying", CPSK) or the change in phase ("differential phase-shift keying", DPSK). The number of different phases used determines the amount of data that can be transmitted in each cycle. Each cycle can be considered to constitute one "symbol", e.g. with two possible phases, each cycle carries one bit. The more phases that are used, the less tollerant to noise the transmissions becomes. Alternatives to PSK are amplitude-shift keying (ASK) and frequency-shift keying (FSK).
  • phenol coefficient — the number indicating the effectiveness of a disinfectant as a germicide relative to phenol, which is arbitrarily assigned the number 1: based on the time required to kill a given quantity of a specific type of bacteria.
  • phosphatidylserine — any of a class of phospholipids occurring in biological membranes and fats
  • photodecomposition — the breaking down of molecules by radiant energy.
  • photoisomerization — isomerization induced by light.
  • photomorphogenesis — plant development that is controlled by light.
  • photosensitization — to make (a material) photosensitive, as by the application of a photosensitive emulsion.
  • phthalic anhydride — a white, crystalline, slightly water-soluble solid, C 8 H 4 O 3 , used chiefly in the manufacture of dyes, alkyd resins, and plasticizers.
  • physical education — systematic instruction in sports, exercises, and hygiene given as part of a school or college program.
  • physical inventory — To carry out a physical inventory is to count all the stock on hand.
  • phytohemagglutinin — a lectin, obtained from the red kidney bean, that binds to the membranes of T cells and stimulates metabolic activity, cell division, etc.
  • picture-in-picture — a feature of some television receivers and similar devices in which one programme is displayed on the full TV screen at the same time as one or more other programmes are displayed in inset windows
  • piecewise function — a function whose definition changes depending on the value of the independent variable
  • pilotless ignition — a system for igniting a gas burner, as in a gas range, furnace, or boiler, without the use of a pilot light.
  • pine tree shilling — a silver coin minted in Massachusetts in the mid to late 17th century, named for the pine tree within a circle shown on the obverse side.
  • piperonyl butoxide — a light-brown liquid, C 1 9 H 3 0 O 5 , used chiefly as a synergist in certain insecticides.
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