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21-letter words containing p, i, r, a, o

  • sun protection factor — SPF.
  • supergranulation cell — one of a number of large convection cells in the photosphere and chromosphere of the sun, each having a diameter of 10,000–20,000 miles (16,000–32,000 km) and lasting longer than a day.
  • surface of projection — the surface upon which an image or a set of points is projected.
  • sympathetic vibration — a vibration induced by resonance.
  • take someone prisoner — to capture and hold someone as a prisoner, esp as a prisoner of war
  • tape operating system — (operating system)   (TOS) An IBM operating system for System 360, used in the early days around 1965 to support the IBM 360 model 30 et al. TOS was a predecessor to IBM's Disk Operating System. TOS died out really early as disks such as the 2311 and 2314 became common with the IBM 360 whereas thet had been a real luxury on the IBM 7090.
  • temperature inversion — inversion (def 12).
  • tenure track position — a position or office that carries with it the opportunity to eventually obtain tenure or the right to permanent employment
  • terrestrial telescope — a refracting telescope having inverting lenses or an eyepiece that presents an erect image.
  • the acting profession — actors considered as a group
  • the central provinces — the Canadian provinces of Ontario and Quebec
  • the joker in the pack — If you describe someone or something as the joker in the pack, you mean that they are different from the other people or things in their group, and can be unpredictable.
  • the press association — the national news agency for the United Kingdom and Ireland
  • the probation service — a criminal justice service that is mainly responsible for dealing with offenders by placing them under the supervision of a probation officer
  • the shipping forecast — a radio broadcast made by the BBC of weather reports and forecasts for the seas around the British Isles
  • theater of operations — the part of the theater of war, including a combat zone and a communications zone, that is engaged in military operations and their support.
  • theoretical physicist — a scientist who studies theoretical physics
  • therapeutic community — a group-based form of therapy for mental disorders, sometimes residential
  • thermal decomposition — Thermal decomposition is the process in which a chemical species breaks down when its temperature is increased.
  • thermal power station — a power station in which heat is converted into electricity
  • third party procedure — impleader.
  • threshold wage policy — a policy whereby wages are increased in accordance with inflation
  • ticker-tape reception — (mainly in New York) the showering of the motorcade of a distinguished politician, visiting head of state, etc, with ticker tape as a sign of welcome
  • to fall into the trap — If someone falls into the trap of doing something, they think or behave in a way which is not wise or sensible.
  • to mix your metaphors — If you mix your metaphors, you use two conflicting metaphors. People do this accidentally, or sometimes deliberately as a joke.
  • topological invariant — a property of a topological space that is a property of every space related to the given space by a homeomorphism.
  • transport segregation — Transport segregation is when particles from a mixture separate because the mixture vibrates while it is being moved.
  • traveling salesperson — a representative of a business firm who travels in an assigned territory soliciting orders for a company's services.
  • triple superphosphate — superphosphate (def 2).
  • triple-superphosphate — Also called acid phosphate. a mixture of calcium acid phosphate and calcium sulfate prepared by treating phosphate rock with sulfuric acid: used chiefly as a fertilizer.
  • ulster unionist party — a Northern Irish political party advocating the maintenance of union with the UK
  • what price something? — what are the chances of something happening now?
  • whip-and-tongue graft — a graft prepared by cutting both the scion and the stock in a sloping direction and inserting a tongue in the scion into a slit in the stock.
  • white-crowned sparrow — a North American sparrow, Zonotrichia leucophrys, having black and white stripes on the head.
  • wholesale price index — an indicator of price changes in the wholesale market
  • wildlife photographer — someone that specializes in taking photographs of wild animals, especially in their natural habitats, and plants
  • workers' compensation — a government-sponsored insurance system, funded by contributions from employers, for compensating employees for injury or occupational disease suffered in connection with their employment
  • writ of habeas corpus — law: petition for hearing
  • xeroderma pigmentosum — a rare inherited disease characterized by sensitivity to ultraviolet light, exposure resulting in lesions and tumors of the skin and eyes.
  • yellow lady's-slipper — a showy orchid, Cypripedium calceolus, of eastern North America, having purple-tinged yellow flowers with an inflated lip petal.
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