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19-letter words containing a, l, o, p

  • philippine mahogany — any of several Philippine trees of the genus Shorea and related genera, having brown or reddish wood used as lumber and in cabinetry.
  • philosophical logic — the branch of philosophy that studies the relationship between formal logic and ordinary language, esp the extent to which the former can be held accurately to represent the latter
  • photopolymerization — polymerization induced by light.
  • photovoltaic effect — the phenomenon in which the incidence of light or other electromagnetic radiation upon the junction of two dissimilar materials, as a metal and a semiconductor, induces the generation of an electromotive force.
  • phthalocyanine blue — a pigment used in painting, derived from copper phthalocyanine and characterized chiefly by its brilliant, dark-blue color and by permanence.
  • pileated woodpecker — a large, black-and-white American woodpecker, Dryocopus pileatus, having a prominent red crest.
  • pilgrimage of grace — a rebellion in 1536 in N England against the Reformation and Henry VIII's government
  • pillars of hercules — the two promontories at the E end of the Strait of Gibraltar: the Rock of Gibraltar on the European side and the Jebel Musa on the African side; according to legend, formed by Hercules
  • pistol-handle knife — a table knife, especially of the 18th century, having a slightly curved handle resembling the grip of a flintlock pistol.
  • planning permission — In Britain, planning permission is official permission that you must get from the local authority before building something new or adding something to an existing building.
  • plastic deformation — In plastic deformation a material changes shape when a stress is applied to it and does not go back to its original state when the stress is removed.
  • play fast and loose — a dramatic composition or piece; drama.
  • play footsie (with) — to touch feet or rub knees (with) in a caressing way, as under the table
  • play to the gallery — a raised area, often having a stepped or sloping floor, in a theater, church, or other public building to accommodate spectators, exhibits, etc.
  • pleased to meet you — greeting
  • pneumoencephalogram — an encephalogram made after the replacement of the cerebrospinal fluid by air or gas, rarely used since the development of the CAT scanner.
  • pointe-aux-trembles — a city in S Quebec, in E Canada, N of Montreal, on the St. Lawrence.
  • police headquarters — building where police are stationed
  • political geography — the branch of human geography that deals with the relationship between political processes and spatial structures (regions, territories, etc)
  • political scientist — A political scientist is someone who studies, writes, or lectures about political science.
  • political-scientist — a social science dealing with political institutions and with the principles and conduct of government.
  • politically correct — marked by or adhering to a typically progressive orthodoxy on issues involving especially ethnicity, gender, sexual orientation, or ecology: The actor’s comment about unattractive women was not politically correct. The CEO feels that people who care about being politically correct are overly sensitive. Abbreviations: PC, P.C.
  • polycarboxylic acid — a type of carboxylic acid containing two or more carboxyl groups
  • polyclonal antibody — a mixture of antibodies of different specificities, as in the serum of a person immunized to various antigens.
  • polyphosphoric acid — any one of a series of oxyacids of phosphorus with the general formula Hn+2PnO3n+1. The first member is pyrophosphoric acid (n = 2) and the series includes the highly polymeric metaphosphoric acid. The higher acids exist in an equilibrium mixture
  • popular sovereignty — the doctrine that sovereign power is vested in the people and that those chosen to govern, as trustees of such power, must exercise it in conformity with the general will.
  • population genetics — the branch of genetics concerned with the hereditary makeup of populations.
  • population pressure — the force exerted by a growing population upon its environment, resulting in dispersal or reduction of the population.
  • port jackson willow — an Australian acacia tree, Acacia cyanophylla, introduced in the 19th century into South Africa, where it is now regarded as a pest
  • positional notation — a type of numeration in which the position of a digit affects its value.
  • post-and-rail fence — a fence constructed of upright wooden posts with horizontal timber slotted through it
  • postal savings bank — any of the savings banks formerly operated by local post offices and limited to small accounts.
  • posttranscriptional — Genetics, Biochemistry. occurring after the formation of RNA from DNA but before the RNA strand leaves the nucleus.
  • potassium bisulfate — a colorless, crystalline, water-soluble solid, KHSO 4 , used chiefly in the conversion of tartrates to bitartrates.
  • pre-order traversal — traversal
  • preferential voting — a system of voting designed to permit the voter to indicate an order of preference for the candidates on the ballot.
  • preproduction trial — a trial to test a prototype of a product before the product goes into full-scale production
  • presentation skills — the set of techniques and skills required successfully to present oral information to others
  • pride-of-california — a shrubby plant, Lathyrus splendens, of the legume family, native to southern California, having showy clusters of pale rose-pink, violet, or magenta flowers and large, smooth, beaked pods.
  • prismatic telescope — a telescope having an eyepiece at the side or top equipped with a reflecting prism, used for taking sights at steep angles.
  • procedural language — (language)   Any programming language in which the programmer specifies an explicit sequences of steps to follow to produce a result (an algorithm). The term should not be confused with "imperative language" - a language that specifies explicit manipulation of state. An example (non-imperative) procedural language is LOGO, which specifies sequences of steps to perform but does not have an internal state. Other procedural languages include Basic, Pascal, C, and Modula-2. Both procedural and imperative languages are in contrast to declarative languages, in which the programmer specifies neither explicit steps nor explicit state manipulation.
  • production platform — offshore power station
  • professional advice — advice given by someone trained in a particular and relevant profession or job
  • professional school — a postgraduate school or college which trains students for a particular profession
  • professionalization — to give a professional character or status to; make into or establish as a profession.
  • profitability study — a study of how much profit a company, organization, etc, makes or how profitable it is
  • programmed learning — a progressively monitored, step-by-step teaching method, employing small units of information or learning material and frequent testing, whereby the student must complete or pass one stage before moving on to the next.
  • property speculator — a person who takes part in property speculation
  • propositional logic — (logic)   (or "propositional calculus") A system of symbolic logic using symbols to stand for whole propositions and logical connectives. Propositional logic only considers whether a proposition is true or false. In contrast to predicate logic, it does not consider the internal structure of propositions.
  • provably unsolvable — The set or property of problems for which no algorithm at all exists. E.g. the Halting Problem. See also provably difficult.
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