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12-letter words containing p, e, r, t

  • peer-to-peer — (networking)   1. The kind of communication found in a system using layered protocols. Each software or hardware component can be considered to communicate only with its peer in the same layer via the connection provided by the lower layers. 2. A decentralised file sharing system like BitTorrent, Gnutella or Kazaa where computers that download data also store that data and serve it to other downloaders. This increases the total bandwidth available in proportion to the number of users and so reduces download time. It also improves resilience by providing multiple redundant sources for the same data. This contrasts with client-server where all clients download the data from a single server (or mirror), sharing its fixed bandwidth. Peer-to-peer networks are typically ad-hoc and rely on users sharing the content they have downloaded for the benefit of other users. Users who fail to do this are called "leaches". A "seed" is a node on a peer-to-peer network that is sharing a complete copy of a file, as opposed to other nodes that may only have some of the parts into which the file has been split.
  • peltier heat — the heat gained or lost at a junction of a thermocouple due to the Peltier effect.
  • pen computer — a computer, as a personal digital assistant, having pattern-recognition software enabling it to read handwritten text or drawings input on the screen by means of a stylus.
  • penalty area — the area, 44 yards (40 meters) wide and 18 yards (16 meters) deep, centered on the goal line and extending in front of the goal, where a foul by a defensive player results in a penalty kick for the offensive team.
  • pencil skirt — women's garment: straight skirt
  • penetrometer — a device for measuring the penetrating power of x-ray or other radiations.
  • penitentiary — a place for imprisonment, reformatory discipline, or punishment, especially a prison maintained in the U.S. by a state or the federal government for serious offenders.
  • pentacrinoid — a larval crinoid resembling members of the genus Pentacrinus
  • pentahydrate — a hydrate that contains five molecules of water, as potassium molybdate, KMoO 4 ⋅5H 2 O.
  • pentahydroxy — (of a molecule) containing five hydroxyl groups.
  • pentyl group — any of the univalent, isomeric groups having the formula C 5 H 1 1 –.
  • pepper steak — strips of beefsteak sautéed with strips of green pepper and onion, and often flavored with soy sauce.
  • peptic ulcer — an erosion of the mucous membrane of the lower esophagus, stomach, or duodenum, caused in part by the corrosive action of the gastric juice.
  • peradventure — chance, doubt, or uncertainty.
  • perambulator — baby carriage.
  • percent sign — a symbol (%) for “percent”: a 10% drop in population.
  • perceptional — the act or faculty of perceiving, or apprehending by means of the senses or of the mind; cognition; understanding.
  • perceptively — having or showing keenness of insight, understanding, or intuition: a perceptive analysis of the problems involved.
  • perceptivity — having or showing keenness of insight, understanding, or intuition: a perceptive analysis of the problems involved.
  • perceptually — of, relating to, or involving perception.
  • percutaneous — administered, removed, or absorbed by way of the skin, as an injection, needle biopsy, or transdermal drug.
  • peremptorily — leaving no opportunity for denial or refusal; imperative: a peremptory command.
  • perenniality — lasting for an indefinitely long time; enduring: her perennial beauty.
  • perfect game — a baseball game in which the same player pitches throughout the full game without allowing any player of the opposing team to reach first base by a base hit, base on balls, error, or any other means. Compare no-hitter.
  • perfect ream — a standard quantity of paper, consisting of 20 quires or 500 sheets (formerly 480 sheets), or 516 sheets (printer's ream or perfect ream)
  • perfect year — the lunisolar calendar used by Jews, as for determining religious holidays, that is reckoned from 3761 b.c. and was established by Hillel II in the 4th century a.d., the calendar year consisting of 353 days (defective year) 354 days (regular year) or 355 days (perfect year or abundant year) and containing 12 months: Tishri, Heshvan, Kislev, Tevet, Shevat, Adar, Nisan, Iyar, Sivan, Tammuz, Av, and Elul, with the 29-day intercalary month of Adar Sheni added after Adar seven times in every 19-year cycle in order to adjust the calendar to the solar cycle. The Jewish ecclesiastical year begins with Nisan and the civil year with Tishri.
  • perfectation — the action or process of becoming or causing to become perfect or complete
  • perfectively — in a perfective manner; thoroughly
  • perfectivity — the state or quality of being (a) perfective
  • perfectivize — to make perfective.
  • perforations — the holes punched that allow individual stamps, coupons, etc to be easily separated
  • performative — (of an expression or statement) performing an act by the very fact of being uttered, as with the expression “I promise,” that performs the act of promising.
  • perfusionist — a medical technician or nurse who monitors and operates equipment that oxygenates the blood, as during open-heart surgery
  • pericarditis — inflammation of the pericardium.
  • pericementum — periodontal membrane.
  • perichaetial — denoting the leaves in mosses that surround the archegonia and, later, the base of the sporophyte
  • perichaetium — a leafy cluster (bracts) around the base of the reproductive organs of some plants, predominantly mosses
  • pericynthion — the point at which a spacecraft launched from earth into a lunar orbit is nearest the moon
  • perimetrical — the border or outer boundary of a two-dimensional figure.
  • perinatology — a field of medicine focusing on problems emerging during the perinatal period.
  • perineuritis — inflammation of the perineurium
  • period costs — Period costs are general costs that cannot be associated with a particular product, such as utilities or insurance.
  • periodontics — the branch of dentistry dealing with the study and treatment of diseases of the periodontium.
  • periodontist — a specialist in periodontics.
  • periodontium — the bone, connective tissue, and gum surrounding and supporting a tooth.
  • periostracum — the external, chitinlike covering of the shell of certain mollusks that protects the limy portion from acids.
  • periphrastic — circumlocutory; roundabout.
  • peristeronic — of, pertaining to, or resembling pigeons
  • peristomatic — surrounding a leaf's stoma or stomata
  • peristrephic — that turns around or revolves
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