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20-letter words containing p, r

  • bacteriochlorophylls — Plural form of bacteriochlorophyll.
  • balanced three-phase — A balanced three-phase voltage or current is one in which the size of each phase is the same, and the phase angles of the three phases differ from each other by 120 degrees.
  • balled-and-burlapped — of or relating to a tree, shrub, or other plant prepared for transplanting by allowing the roots to remain covered by a ball of soil around which canvas or burlap is tied.
  • ballet-wrap cardigan — a cardigan with wrapover fronts which are fastened with wraparound ties
  • baptism for the dead — the baptism of a living person in the place of and for the sake of one who has died unbaptized: now practiced chiefly by Mormons.
  • barothermohygrograph — an automatic instrument for recording pressure, temperature, and humidity.
  • barred spiral galaxy — a spiral galaxy whose center has the form of an extended bar.
  • bartramian sandpiper — upland sandpiper.
  • basic object adapter — (architecture)   (BOA) Part of the CORBA architecture.
  • basic oxygen process — a process for refining steel in which oxygen is blown into the molten iron
  • be for the high jump — to be liable to receive a severe reprimand or punishment
  • be hard pushed to do — If you are hard pushed to do something, you find it very difficult to do it.
  • belgian shepherd dog — a medium-sized well-proportioned dog of a breed that resembles an Alsatian in appearance and is often used as a sheepdog or a guard dog
  • benztropine mesylate — a synthetic anticholinergic, C 21 H 25 NO⋅CH 4 O 3 S, used in the treatment of Parkinson's disease.
  • binge-purge syndrome — bulimia.
  • bismarck archipelago — a group of over 200 islands in the SW Pacific, northeast of New Guinea: part of Papua New Guinea. Main islands: New Britain, New Ireland, Lavongai, and the Admiralty Islands. Chief town: Rabaul, on New Britain. Pop: 566 610 (2000). Area: 49 658 sq km (19 173 sq miles)
  • black-bellied plover — a large plover, Pluvialis squatarola, of both the New and Old Worlds, having black underparts when in nuptial plumage.
  • board of supervisors — the governing body of a county in many U.S. states, especially in the Midwest and the East, consisting of from 15 to 100 members elected from towns, townships, cities, or wards.
  • bomb disposal expert — an expert in bomb disposal
  • bottom hole pressure — Bottom hole pressure is the pressure at the bottom of the hole, usually measured in pounds per square inch.
  • bottom-up processing — a processing technique, either in the brain or in a computer, in which incoming information is analysed in successive steps and later-stage processing does not affect processing in earlier stages
  • brachiocephalic vein — either of two major veins, formed by the merger of the subclavian and internal jugular veins, that drain blood from the head and arms.
  • brain fingerprinting — a technique in which sensors worn on the head are used to measure the involuntary brain activity of someone in response to certain images or pieces of evidence pertaining to a crime
  • break the glass plan — a plan that is put into operation in an emergency when all other options have been exhausted
  • bristly sarsaparilla — a coarse plant, Aralia hispida, of the ginseng family, of eastern North America, having a loose cluster of small, greenish flowers and black fruit.
  • brown recluse spider — a very poisonous, medium-sized spider (Loxosceles reclusa), common in the U.S., having a violin-shaped mark on its cephalothorax and only six eyes
  • buck's horn plantain — a Eurasian plant, Plantago coronopus, having leaves resembling a buck's horn: family Plantaginaceae
  • buoyancy compensator — an inflatable vest used to control one's buoyancy underwater or to rest at the surface, usually having a connecting hose for inflation or deflation by mouth and a CO 2 cartridge for rapid, emergency inflation.
  • caesar and cleopatra — a comedy (1898) by G. B. Shaw.
  • calcium hypochlorite — a white, crystalline compound, Ca(OCl) 2 , used as a disinfectant and bleaching agent.
  • calcium permanganate — a violet, crystalline, deliquescent solid, Ca(MnO 4) 2 ⋅4H 2 O, used chiefly as a disinfectant and deodorizer.
  • calculus of pleasure — (in utilitarianism) appraisal of possible alternative choices in terms of the amount of pleasure to be gained and pain to be avoided in each.
  • canine leptospirosis — an often fatal intestinal disease in dogs, caused by any of several spirochetes of the genus Leptospira.
  • capacitive crosstalk — Capacitive crosstalk is a situation in which a signal on one line can cause a smaller version of the same signal on an adjacent line because of the capacitance between the lines.
  • capacitive reactance — the opposition of capacitance to alternating current, equal to the reciprocal of the product of the angular frequency of the current times the capacitance. Symbol: X C.
  • cape prince of wales — a cape in W Alaska, on the Bering Strait opposite the coast of the extreme northeast of Russia: the westernmost point of North America
  • capillary attraction — a force that is the resultant of adhesion, cohesion, and surface tension in liquids which are in contact with solids, as in a capillary tube: when the cohesive force is greater, the surface of the liquid tends to rise in the tube, as with mercury; when the adhesive force is greater, the surface tends to be depressed, as with water
  • capital transactions — the flow of money and assets
  • capital transfer tax — (in Britain) a tax payable from 1974 to 1986 at progressive rates on the cumulative total of gifts of money or property made during the donor's lifetime or after his death. It was replaced by inheritance tax
  • carbocyclic compound — any of a group of organic chemical compounds in which all the atoms composing the ring are carbon atoms, as benzene or cyclopropane.
  • card up one's sleeve — a plan or resource kept secret or held in reserve
  • carpathian mountains — a mountain system of central and E Europe, extending from Slovakia to central Romania: mainly forested, with rich iron ore resources. Highest peak: Gerlachovka, 2663 m (8788 ft)
  • casing head pressure — The casing head pressure is the pressure on the casing, which is measured at the wellhead.
  • cassegrain telescope — an astronomical reflecting telescope in which incident light is reflected from a large concave paraboloid mirror onto a smaller convex hyperboloid mirror and then back through a hole in the concave mirror to form the image
  • cast a pall over sth — If something unpleasant casts a pall over an event or occasion, it makes it less enjoyable than it should be.
  • catastrophic failure — Catastrophic failure is sudden and complete failure which cannot be put right.
  • catastrophic illness — A catastrophic illness is a major health event that takes place during a particular period of time, such as a heart attack, stroke, or cancer.
  • cavendish experiment — the experiment, conducted by Henry Cavendish, that determined the constant of gravitation by using a torsion balance and measuring the torsion produced by two masses placed at given distances from the masses on the balance.
  • cellular respiration — the oxidation of organic compounds that occurs within cells, producing energy for cellular processes.
  • center of percussion — the point on a rigid body, suspended so as to be able to move freely about a fixed axis, at which the body may be struck without changing the position of the axis.
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