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20-letter words containing p, e, r

  • operating conditions — Operating conditions are a set of conditions for operating a particular system or process.
  • operation barbarossa — the codename for Hitler's invasion (1941) of Russia
  • operational calculus — a method for solving a differential equation by treating differential operators as ordinary algebraic quantities, thus obtaining a simpler problem.
  • operational database — (database)   A database containing up-to-date, modifiable data, in contrast to a decision support database.
  • operational strategy — a plan or set of plans for successfully running a business, etc
  • operator overloading — overloading
  • ophthalmodynamometer — a device for determining the nearest point of ocular convergence.
  • optical mark reading — the reading of marks by an optical device whereby the information can be stored in machine-readable form
  • order code processor — (processor)   The ICL 2900, ICL 3900 and above term for "CPU".
  • organization expense — the costs associated with organizing a business entity and bringing it into existence
  • orthopaedic mattress — a specially firm mattress designed to help correct or ameliorate the discomfort of disorders of the spine and joints
  • overseer of the poor — a minor official of a parish attached to the workhouse or poorhouse
  • owner-occupied house — a house that is owned by the person who lives in it
  • packed like sardines — If you say that a crowd of people are packed like sardines, you are emphasizing that they are sitting or standing so close together that they cannot move easily.
  • paint the town (red) — to go on a boisterous spree; carouse
  • pale western cutworm — the larva of a noctuid moth, Agrotis orthogonia, of the western U.S. and Canada, that seriously damages grains, beets, potatoes, alfalfa, etc., by feeding underground on roots and stems.
  • palos verdes estates — a town in S California.
  • pan-american highway — a road system proposed in the 1920s linking nations of the Western Hemisphere, extending from Alaska to Santiago, Chile, with some gaps remaining in Panama and Colombia. The section between Nuevo Laredo, Mexico and Panama City is known as the Inter-American Highway Total length about 16,000 miles (25,744 km).
  • paper chromatography — the separation of mixtures into their constituents by preferential adsorption by a solid, as a column of silica (column chromatography) or a strip of filter paper (paper chromatography) or by a gel.
  • paper qualifications — qualifications gained through official examinations, etc, rather than through experience
  • pappus of alexandria — 3rd century bc, Greek mathematician, whose eight-volume Synagoge is a valuable source of information about Greek mathematics
  • para-dichlorobenzene — a white, crystalline, volatile, water-insoluble solid, C 6 H 4 Cl 2 , of the benzene series, having a penetrating odor: used chiefly as a moth repellent.
  • parallel of altitude — almucantar.
  • parallel of latitude — parallel (def 9).
  • parametric amplifier — a device, as an electron tube or transistor, that amplifies a high-frequency input signal by sinusoidally varying the reactance of the circuit.
  • parametric equalizer — an electronic device for cutting or boosting selected frequencies by continuous narrowing or widening of the frequencies to be filtered
  • parametric equations — one of two or more equations expressing the location of a point on a curve or surface by determining each coordinate separately.
  • parkinson's syndrome — a complex of symptoms indistinguishable from Parkinson's disease, commonly affecting boxers or sometimes occurring as a result of substance abuse or an encephalitic infection.
  • partial differential — an expression obtained from a given function of several variables by taking the partial derivative with respect to one of the variables and multiplying by the increment in that variable.
  • particle accelerator — accelerator (def 7).
  • particle beam weapon — a weapon that fires particle beams into the atmosphere or space
  • particulate scrubber — A particulate scrubber is a scrubber in which a liquid is mixed with the gas to collect solids.
  • partitioned data set — (file format)   (PDS) A data set on an IBM mainframe that contains members, each of which acts like a separate data set. Partitioned data sets are more space-efficient than individual data sets, because they can put more than one data set on a track. They are also used to hold libraries, with one function per member. The syntax for a member is NAME.OF.PDS(MEMBER) although some systems (such as Phoenix) could use NAME.OF.PDS:MEMBER Original PDSes were of fixed size, and needed frequent compression to recover space after deleting or changing members. Newer PDS/E Extended PDSes do not have this problem.
  • pass in one's marble — to die
  • patent foramen ovale — a congenital heart defect resulting from failure of the foramen ovale to close shortly after birth.
  • paternal grandfather — the father of someone's father
  • paternal grandmother — the mother of someone's father
  • pave the way for sth — If one thing paves the way for another, it creates a situation in which it is possible or more likely that the other thing will happen.
  • pay through the nose — the part of the face or facial region in humans and certain animals that contains the nostrils and the organs of smell and functions as the usual passageway for air in respiration: in humans it is a prominence in the center of the face formed of bone and cartilage, serving also to modify or modulate the voice.
  • peak programme meter — an instrument for assessing the maximum levels of an electrical sound signal
  • peasecod breastplate — a breastplate having a long central ridge terminating in a raised area overhanging the waistline.
  • peculiar institution — black slavery in the southern U.S. before the Civil War.
  • pedal steel (guitar) — a steel guitar mounted on legs and equipped with pedals that serve as an additional means of changing pitch
  • pedro juan caballero — a city in E central Paraguay.
  • peer-to-peer network — peer-to-peer
  • pentobarbital sodium — a barbiturate drug used in medicine as a sedative and hypnotic. Formula: C11H17N2O3Na
  • people's paths cross — If you cross someone's path or if your paths cross, you meet them by chance.
  • peremptory challenge — a formal objection to the service of a juror by a party to a criminal prosecution or a civil action that requires no showing of cause.
  • peremptory exception — a plea in bar of an action.
  • periarteritis nodosa — polyarteritis.
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