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16-letter words containing r, e, t, o, a

  • partial ordering — a relation defined on a set, having the properties that each element is in relation to itself, the relation is transitive, and if two elements are in relation to each other, the two elements are equal.
  • parts of lindsey — an area in E England constituting a former administrative division of Lincolnshire
  • pascal's theorem — the theorem that the lines joining adjacent vertices of a hexagon intersect the same straight line if alternate vertices lie on two intersecting straight lines.
  • past progressive — a verb form consisting of an auxiliary be in the past tense followed by a present participle and used especially to indicate that an action or event was incomplete or in progress at a point of reference in the past, as was sleeping in I was sleeping when the phone rang.
  • pastoral epistle — any one of three New Testament books, I or II Timothy or Titus, that stress pastoral and ecclesiastical concerns.
  • patched-together — makeshift; roughly made from disparate elements
  • paterson's curse — a purple-flowered noxious plant, Echium plantagineum, a close relative of viper's bugloss, naturalized in Australia and NZ where its harmfulness to livestock has prompted attempts to limit its spread
  • peach tree borer — the larva of any of several clearwing moths, as Sanninoidea exitiosa, that bore into the wood of the peach and other drupaceous trees.
  • peano arithmetic — (mathematics)   Giuseppe Peano's system for representing natural numbers inductively using only two symbols, "0" (zero) and "S" (successor). This system could be expressed as a recursive data type with the following Haskell definition: data Peano = Zero | Succ Peano The number three, usually written "SSS0", would be Succ (Succ (Succ Zero)). Addition of Peano numbers can be expressed as a simple syntactic transformation: plus Zero n = n plus (Succ m) n = Succ (plus m n) (1995-03-28)
  • peasants' revolt — the first great popular rebellion in English history (1381), caused by the imposition of an unpopular poll tax: it lasted less than a month and failed as a social revolution
  • pectoralis major — the larger of the two large chest muscles that assist in movements of the shoulder and upper arm
  • pectoralis minor — the smaller of the two large chest muscles that assist in movements of the shoulder and upper arm
  • pension mortgage — an arrangement whereby a person takes out a mortgage and pays the capital repayment instalments into a pension fund and the interest to the mortgagee. The loan is repaid out of the tax-free lump sum proceeds of the pension plan on the borrower's retirement
  • people's charter — the principles or movement of a party of political reformers, chiefly workingmen, in England from 1838 to 1848: so called from the document (People's Charter or National Charter) that contained a statement of their principles and demands.
  • percentage point — difference: one per cent
  • perchloromethane — carbon tetrachloride.
  • perforated ulcer — an ulcer that bursts through the stomach wall and leaks food and gastric juices into the abdominal cavity
  • performance test — a test requiring little or no use of language, the test materials being designed to elicit manual or behavioral responses rather than verbal ones.
  • periodic tenancy — the letting of a dwelling for a repeated short term, as by the week, month, or quarter, with no end date
  • permafrost table — the variable surface constituting the upper limit of permafrost. Compare frostline (def 2).
  • perpetual motion — the motion of a theoretical mechanism that, without any losses due to friction or other forms of dissipation of energy, would continue to operate indefinitely at the same rate without any external energy being applied to it.
  • personal details — details about a person such as their name and address
  • personal effects — belongings
  • personal liberty — the liberty of an individual to do his or her will freely except for those restraints imposed by law to safeguard the physical, moral, political, and economic welfare of others.
  • personal stylist — a person employed by a rich or famous client to offer advice on clothes, hairstyles, and other aspects of personal appearance
  • personal trainer — a person who works one-on-one with a client to plan or implement an exercise or fitness regimen.
  • personal tuition — private tuition
  • personality cult — deliberately cultivated adulation of a person, esp a political leader
  • personality test — an instrument, as a questionnaire or series of standardized tasks, used to measure personality characteristics or to discover personality disorders.
  • personality type — a cluster of personality traits commonly occurring together
  • peter pan collar — a close-fitting flat or rolled collar with rounded ends that meet in front of a high, round neckline.
  • petrol rationing — a scheme rationing the amount of petrol that an individual is allowed to purchase
  • pharmacogenetics — the branch of pharmacology that examines the relation of genetic factors to variations in response to drugs.
  • pharmacokinetics — the branch of pharmacology that studies the fate of pharmacological substances in the body, as their absorption, distribution, metabolism, and elimination.
  • pheochromocytoma — a tumor of the sympathetic nervous system or adrenal medulla, that produces excess norepinephrine and epinephrine and causes hypertension, headaches, nausea, etc.
  • phosphor fatigue — screen saver
  • photopolarimeter — a polarimeter that uses a photocell.
  • photorespiration — the oxidation of carbohydrates in many higher plants in which they get oxygen from light and then release carbon dioxide, somewhat different from photosynthesis.
  • phytoremediation — a process of decontaminating soil or water by using plants and trees to absorb or break down pollutants.
  • picture postcard — postcard (def 1).
  • pithecanthropine — of, belonging to, or resembling a former genus (Pithecanthropus, now classified as Homo erectus) of extinct early humans, who lived in Java, China, Europe, and Africa
  • pithecanthropoid — of, relating to, or resembling the former genus Pithecanthropus or one of its members.
  • plaster of paris — calcined gypsum in white, powdery form, used as a base for gypsum plasters, as an additive of lime plasters, and as a material for making fine and ornamental casts: characterized by its ability to set rapidly when mixed with water.
  • platform-balance — a scale with a platform for holding the items to be weighed.
  • platoon sergeant — the senior noncommissioned officer in a platoon, equivalent to sergeant first class.
  • pneumatic trough — a trough filled with liquid, especially water, for collecting gases in bell jars or the like by displacement.
  • pocket billiards — pool2 (def 1).
  • pocket secretary — a long, narrow walletlike case, usually of leather and containing pockets for credit and business cards, paper money, etc., and sometimes a notepad and pencil.
  • poitou-charentes — a region of W central France, on the Bay of Biscay: mainly low-lying
  • polar coordinate — Usually, polar coordinates. one of two coordinates used to locate a point in a plane by the length of its radius vector and the angle this vector makes with the polar axis (polar angle)
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