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21-letter words containing a, p, o, h

  • reinforcement therapy — a behavior modification technique in which appropriate behavior is strengthened through systematic reinforcement.
  • replacement algorithm — The method used to determine which entry in an associative cache to flush to main memory when it is desired to cache a new block of data. The "least recently used" algorithm flushed the block which has not been accessed for the longest time. A random replacement algorithm picks any block with equal probability.
  • reverse polish syntax — postfix notation
  • schlieren photography — a type of photography which records schlieren
  • scholastic philosophy — the system of philosophy, theology, and teaching that dominated medieval western Europe and was based on the writings of the Church Fathers and (from the 12th century) Aristotle, the Greek philosopher (384–322 bc)
  • scorched earth policy — a military practice of devastating the property and agriculture of an area before abandoning it to an advancing enemy.
  • scorched-earth policy — a military practice of devastating the property and agriculture of an area before abandoning it to an advancing enemy.
  • sheppard's correction — a method of correcting the bias in standard deviations and higher moments of distributions that arises from grouping values of the variable.
  • single spanish burton — a tackle having a runner as well as the fall supporting the load, giving a mechanical advantage of three, neglecting friction.
  • snappy video snapshot — (hardware)   (registered trademark) A frame grabber for the IBM PC designed and marketed by Play, Inc..
  • snr bandwidth product — (communications)   The integral of the SNR over frequency. The SNR bandwidth product is an important limit in the capacity of a communication channel.
  • social anthropologist — an anthropologist who deals with cultural and social phenomena such as kinship systems or beliefs, esp of nonliterate peoples
  • sodium metabisulphite — an inorganic compound with the chemical formula Na2S2O5 that is used as a preservative, antioxidant and disinfectant
  • somatotrophic-hormone — a hormone secreted by the anterior pituitary gland, that stimulates growth in humans.
  • south pacific current — an ocean current that flows E in the South Pacific Ocean parallel to the Antarctic Circumpolar Current.
  • space shuttle orbiter — orbiter (def 1).
  • spherical coordinates — Usually, spherical coordinates. any of three coordinates used to locate a point in space by the length of its radius vector and the angles this vector makes with two perpendicular polar planes.
  • spicebush swallowtail — a swallowtail butterfly, Papilio troilus, having a dark body with yellow spots on the forewings and greenish hind wings.
  • spotted alfalfa aphid — a pale yellowish aphid, Therioaphis maculata, of the southern U.S., especially west of the Mississippi River, that is marked with black spots and has fine spines on its back: a pest mainly of alfalfa and some other legumes, as clover.
  • strachey, christopher — Christopher Strachey
  • structural psychology — psychology centering on the analysis of the structure or content of conscious mental states by introspective methods.
  • sympathetic vibration — a vibration induced by resonance.
  • symphonie fantastique — a programmatic symphony (1830–31) in five movements by Hector Berlioz.
  • the acting profession — actors considered as a group
  • the antipodes islands — a group of small uninhabited islands in the South Pacific, southeast of and belonging to New Zealand. Area: 62 sq km (24 sq miles)
  • the apple of your eye — If you say that someone is the apple of your eye, you mean that they are very important to you and you are extremely fond of them.
  • the central provinces — the Canadian provinces of Ontario and Quebec
  • the cream of the crop — You can refer to the best people or things of a particular kind as the cream of the crop.
  • 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
  • to be a hospital case — if you say that someone or something is a hospital case, you mean that they need urgent help because they are doing very badly
  • 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.
  • to move the goalposts — If you accuse someone of moving the goalposts, you mean that they have changed the rules in a situation or an activity, in order to gain an advantage for themselves and to make things difficult for other people.
  • to play the race card — if someone plays the race card they bring up the issue of race in a discussion, perhaps for sympathy or to seek popularity by appealing to racist sentiment
  • 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.
  • up hill and down dale — strenuously and persistently
  • 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.
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