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18-letter words containing a, e, r, i, l, o

  • 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.
  • passive vocabulary — all the words, collectively, that a person can understand
  • pectoral sandpiper — an American sandpiper, Calidris melanotos, the male of which, when courting, inflates its chest conspicuously.
  • pellitory of spain — a small Mediterranean plant, Anacyclus pyrethrum, the root of which contains an oil formerly used to relieve toothache: family Asteraceae (composites)
  • people trafficking — the practice of bringing immigrants into a country illegally
  • percussion flaking — a method of forming a flint tool by striking flakes from a stone core with another stone or a piece of bone or wood.
  • perlocutionary act — the action of affecting someone by uttering certain words
  • 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.
  • personal insurance — insurance on personal risk, such as car insurance, health insurance or loss of earnings insurance
  • personal organizer — a small notebook with sections for personal information, as dates and addresses.
  • pescadores-islands — (used with a plural verb) Penghu.
  • phanerocrystalline — (of a rock) having the principal constituents in the form of crystals visible to the naked eye.
  • phosphatidylserine — any of a class of phospholipids occurring in biological membranes and fats
  • physical geography — the branch of geography concerned with natural features and phenomena of the earth's surface, as landforms, drainage features, climates, soils, and vegetation.
  • physical inventory — To carry out a physical inventory is to count all the stock on hand.
  • pileolated warbler — either of two western subspecies of Wilson's warbler.
  • pilotless aircraft — an aircraft equipped for operation by radio or by robot control, without a human pilot aboard; drone.
  • plains grasshopper — a large, destructive short-horned grasshopper, Brachystola magna, of the western U.S., marked by pinkish hind wings.
  • plane polarization — a type of polarization in which the electric vector of waves of light or other electromagnetic radiation is restricted to vibration in a single plane
  • plane trigonometry — the branch of trigonometry dealing with plane triangles.
  • point d'angleterre — a bobbin lace in which the design is worked out with either a needle or bobbin.
  • point-bearing pile — a pile depending on the soil or rock beneath its foot for support.
  • political prisoner — sb imprisoned for political dissidence
  • polynesian tattler — a sandpiper, H. incanus, native to the Pacific coastal regions
  • population figures — population totals; statistics relating to the size of populations
  • portable equipment — Portable equipment is electrical equipment that can easily be moved from one place to another while in operation or while connected to the supply.
  • portage la prairie — a city in S Manitoba, in S central Canada, W of Winnipeg.
  • positively charged — having a positive charge
  • post-revolutionary — of, pertaining to, characterized by, or of the nature of a revolution, or a sudden, complete, or marked change: a revolutionary junta.
  • postmillenarianism — postmillennialism.
  • postviral syndrome — debilitating condition occurring as a sequel to viral illness
  • potassium chlorate — a white or colorless, crystalline, water-soluble, poisonous solid, KClO 3 , used chiefly as an oxidizing agent in the manufacture of explosives, fireworks, matches, bleaches, and disinfectants.
  • potassium chloride — a white or colorless, crystalline, water-soluble solid, KCl, used chiefly in the manufacture of fertilizers and mineral water, and as a source of other potassium compounds.
  • potassium fluoride — a white, crystalline, hygroscopic, toxic powder, KF, used chiefly as an insecticide, a disinfectant, and in etching glass.
  • potential gradient — the rate of change of potential with respect to distance in the direction of greatest change.
  • prepositional verb — a combination of verb and preposition, often with idiomatic meaning, differing from other phrasal verbs in that an object must always follow the preposition, as take after in The children take after their mother.
  • prerelease showing — a showing of a film before it goes on general release
  • presentation layer — (networking)   The second highest layer (layer 6) in the OSI seven layer model. Performs functions such as text compression, code or format conversion to try to smooth out differences between hosts. Allows incompatible processes in the application layer to communicate via the session layer. Documents: ITU Rec. X.226 (ISO 8823), ITU Rec. X.216 (ISO 8822).
  • presumption of law — a presumption based upon a policy of law or a general rule and not upon the facts or evidence in an individual case.
  • primate of england — a title of the archbishop of Canterbury.
  • prisoner's dilemma — (in game theory) a scenario in which the outcome of one person's decision is determined by the simultaneous decisions of the other participants, resulting in a bad outcome for all of them if all act in their own self-interest.
  • probability theory — the theory of analyzing and making statements concerning the probability of the occurrence of uncertain events. Compare probability (def 4).
  • programme planning — the act of creating plans or schedules, esp in relation to your occupation
  • proprietary colony — any of certain colonies, as Maryland and Pennsylvania, that were granted to an individual or group by the British crown and that were granted full rights of self-government.
  • provascular tissue — procambium.
  • przewalski's horse — a wild horse, Equus caballus przevalskii, chiefly of Mongolia and Sinkiang, characterized by light yellow coloring and a stiff, upright black mane with no forelock: the only remaining breed of wild horse, it is now endangered and chiefly maintained in zoos.
  • pulmonary embolism — the blockage of a pulmonary artery, often by a blood clot, that stops the flow of blood to the lungs and which can result in death if untreated
  • pulmonic airstream — a current of lung air set in motion by the respiratory muscles in the production of speech.
  • pyromucic aldehyde — furfural.
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