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20-letter words containing p, r, e, c, l

  • member of the public — a member of the general population
  • microelectrophoresis — any of several techniques for observing, by means of a microscope or an ultramicroscope, the electrophoresis of minute surface particles.
  • mollweide projection — homolographic projection.
  • mother of the chapel — (in British trade unions in the publishing and printing industries) a woman shop steward
  • multiple inheritance — (programming)   In object-oriented programming, the possibility that a class may have more than one direct superclass in the class hierarchy. The opposite is single inheritance.
  • multiplicative group — a group in which the operation of the group is multiplication.
  • multipurpose vehicle — a large car, similar to a van, designed to carry up to eight passengers
  • multistorey car park — a car park consisting of several levels
  • neapolitan ice cream — variously flavored and colored ice cream and ice mixtures frozen in layers.
  • nephroangiosclerosis — (pathology) sclerosis of the renal arterioles.
  • net national product — the gross national product less allowance for depreciation of capital goods. Abbreviation: NNP.
  • neurophysiologically — In terms of, or with regard to, neurophysiology.
  • neuropsychiatrically — In terms of neuropsychiatry.
  • neuropsychologically — In terms of or by means of neuropsychology.
  • nonrepeating decimal — a decimal representation of any irrational number, having the property that no sequence of digits is repeated ad infinitum.
  • north american plate — a major tectonic division of the earth's crust, comprising Greenland and the continent of North America and the suboceanic Labrador and North American Basins, and bounded on the east by the Mid-Atlantic Ridge, on the south by the Caribbean and South American Plates, and on the west by the San Andreas fault and Aleutian Trench.
  • north celestial pole — the point of intersection of the earth's extended axis and the northern half of the celestial sphere, lying about 1° from Polaris
  • occupational therapy — a form of therapy in which patients are encouraged to engage in vocational tasks or expressive activities, as art or dance, usually in a social setting.
  • omega-minus particle — a baryon with strangeness −3, isotopic spin 0, and negative charge; predicted from the mathematics of the Eightfold Way and subsequently discovered. Symbol: Ω −.
  • open learning centre — an establishment which provides further education on a flexible part-time basis
  • operational calculus — a method for solving a differential equation by treating differential operators as ordinary algebraic quantities, thus obtaining a simpler problem.
  • optical mark reading — the reading of marks by an optical device whereby the information can be stored in machine-readable form
  • 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.
  • 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.
  • paper qualifications — qualifications gained through official examinations, etc, rather than through experience
  • 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.
  • 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
  • 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.
  • 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.
  • pedro juan caballero — a city in E central Paraguay.
  • 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.
  • permonosulfuric acid — persulfuric acid (def 1).
  • peroxyacetyl nitrate — an unstable nitrogen compound, found in certain types of smog, that is an irritant, esp. to the eyes and to plants
  • peroxysulphuric acid — a white hygroscopic crystalline unstable oxidizing acid. Formula: H2SO5
  • perpendicular gothic — the style of Gothic architecture in England during the 14th and 15th centuries, characterized by tracery having vertical lines, a four-centred arch, and fan vaulting
  • personal cleanliness — physical cleanliness; the cleanliness of a person's body and habits
  • pessimising compiler — /pes'*-mi:z"ing k*m-pi:l"r/ (Antonym of "optimising compiler") A compiler that produces object code that is worse than the straightforward or obvious hand translation. The implication is that the compiler is actually trying to optimise the program, but through excessive cleverness is doing the opposite. A few pessimizing compilers have been written on purpose, however, as pranks or burlesques.
  • pest control officer — a person who gets rid of pests such as rats and mice
  • phenylpropyl acetate — a colorless, water-insoluble liquid, C 1 0 H 1 2 O 2 , used chiefly in perfumery.
  • phillips screwdriver — a screwdriver that has a cross at the tip that is intended to be used with Phillips screws
  • phillips-screwdriver — a screw head having two partial slots crossed at right angles, driven by a special screwdriver (Phillips screwdriver)
  • photoelectric effect — the phenomenon in which the absorption of electromagnetic radiation, as light, of sufficiently high frequency by a surface, usually metallic, induces the emission of electrons from the surface.
  • photogelatin process — collotype (def 1).
  • phthalocyanine green — a pigment used in painting, derived from chlorinated copper phthalocyanine and characterized chiefly by its intense green color and permanence.
  • physical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
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