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18-letter words containing n, y, o, r

  • polyvinyl chloride — a white, water-insoluble, thermoplastic resin, derived by the polymerization of vinyl chloride: used chiefly for thin coatings, insulation, and pipings.
  • population pyramid — a graph showing the distribution of a population by sex, age, etc.
  • post-revolutionary — of, pertaining to, characterized by, or of the nature of a revolution, or a sudden, complete, or marked change: a revolutionary junta.
  • postviral syndrome — debilitating condition occurring as a sequel to viral illness
  • potassium myronate — sinigrin.
  • prayer of manasses — a book of the Apocrypha.
  • 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).
  • priority interrupt — (jargon)   Any stimulus compelling enough to yank one right out of hack mode. Classically used to describe being dragged away by an SO for immediate sex, but may also refer to more mundane interruptions such as a fire alarm going off in the near vicinity. Also called an NMI (non-maskable interrupt), especially in PC-land.
  • priority inversion — (parallel)   The state of a concurrent system where a high priority task is waiting for a low priority task which is waiting for a medium priority task. The system may become unstable and crash under these circumstances. In an operating system that uses multiple tasks, each task (or context) may be given a priority. These priorities help the scheduler decide which task to run next. Consider tasks, L, M, and H, with priorities Low, Medium, and High. M is running and H is blocked waiting for some resource that is held by L. So long as any task with a priority higher than L is runable, it will prevent task L, and thus task H, from running. Priority inversion is generally considered either as a high-level design failure or an implementation issue to be taken into account depending on who is talking. Most operating systems have methods in place to prevent or take inversion into account. Priority inheritance is one method. The most public instance of priority inversion is the repeated 'fail-safe' rebooting of the Mars Pathfinder. base station ('Sagan Memorial Station').
  • processionary moth — a moth of the family Thaumetopoeidae, esp the oak processionary moth (Thaumetopoea processionea), the larvae of which leave the communal shelter nightly for food in a V-shaped procession
  • production company — an organization which produces, films, plays, television or radio programmes
  • productivity bonus — an extra payment made to workers for being more productive or yielding more favourable results than normal
  • property insurance — insurance coverage for land and housing
  • 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.
  • protein deficiency — a lack or insuffiency of protein
  • proton synchrotron — a synchrotron used for accelerating protons.
  • psychogalvanometer — a type of galvanometer for detecting and measuring psychogalvanic currents.
  • 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
  • put your foot down — If someone puts their foot down, they use their authority in order to stop something happening.
  • quality controller — a person responsible for checking that the goods or services produced by an organization are of an acceptable standard
  • quite the contrary — not at all, the very opposite
  • radius of gyration — the distance from an axis at which the mass of a body may be assumed to be concentrated and at which the moment of inertia will be equal to the moment of inertia of the actual mass about the axis, equal to the square root of the quotient of the moment of inertia and the mass.
  • raffinate recovery — Raffinate recovery is the use of a substance which is left after a process is complete and the desired substances have been removed.
  • raman spectroscopy — a form of spectroscopy which uses the Raman effect for studying molecules
  • random walk theory — the theory that the future movement of share prices does not reflect past movements and therefore will not follow a discernible pattern
  • range of stability — the angle to the perpendicular through which a vessel may be heeled without losing the ability to right itself.
  • rapid eye movement — rapidly shifting, continuous movements of the eyes beneath closed lids during the stage of sleep characterized by dreaming.
  • ready when you are — If you say to someone 'Ready when you are', you are telling them that you are now ready to do something and that as soon as they are ready, you will do it.
  • recovery operation — the process of locating and retrieving bodies, esp following an explosion or natural disaster
  • reduction strategy — (theory)   An algorithm for deciding which redex(es) to reduce next. Different strategies have different termination properties in the presence of recursive functions or values. See string reduction, normal order reduction, applicative order reduction, parallel reduction
  • reentering polygon — a polygon having one or more reentering angles.
  • reflection density — a measure of the extent to which a surface reflects light or other electromagnetic radiation, equal to the logarithm to base ten of the reciprocal of the reflectance
  • registered company — a company which has officially registered its business
  • relative minor key — a minor key that has the same key signature as a major key, but a different tonic
  • repayment mortgage — a mortgage that you pay back in monthly repayments which consist of the accrued interest in addition to the original amount borrowed
  • restoration comedy — English comedy of the period of the Restoration, stressing manners and social satire.
  • restriction enzyme — any of a group of enzymes that catalyze the cleavage of DNA molecules at specific sites: used for gene splicing in recombinant DNA technology and for chromosome mapping.
  • reversionary bonus — a bonus added to the sum payable on death or at the maturity of a with-profits assurance policy
  • revolutionary wars — American Revolution.
  • rhondda cynon taff — a county borough in S Wales, created from part of Mid Glamorgan in 1996. Pop: 231 600 (2003 est). Area: 558 sq km (215 sq miles)
  • rhyming dictionary — a specialist dictionary organized by the final sounds of words, used to write poetry
  • room occupancy tax — Room occupancy tax is a tax that guests at a hotel have to pay in order to stay there.
  • root canal therapy — endodontics.
  • rotary clothesline — an apparatus of radiating spokes that support lines on which clothes are hung to dry
  • rotational latency — (storage, hardware)   The time for the start of the required sector on a disk to appear underneath the read/write head. The worst case is where it has just passed the head when the request is received. For a disk drive with N heads per surface, rotating at R revolutions per minute, the average rotational latency will be L = 30/NR seconds. Rotational latency is one component of access time.
  • run one's eye over — to glance at hurriedly
  • running commentary — non-stop description of sth
  • safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
  • saint george's day — April 23, celebrated in parts of the British Commonwealth in honor of the patron saint of Britain and especially in New Zealand as a bank holiday.
  • science dictionary — a specialized dictionary covering terms in the life, earth, and physical sciences, such as the online Science Dictionary on Dictionary.com. A science dictionary includes many technical terms with precise, specialized meanings—terms not normally found in general dictionaries—making it an invaluable resource for students and professionals in scientific fields.
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