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20-letter words containing p, a, y, t

  • operational strategy — a plan or set of plans for successfully running a business, etc
  • ophthalmodynamometer — a device for determining the nearest point of ocular convergence.
  • 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.
  • part way through sth — in the course of something; in the middle of something
  • pass the time of day — to exchange casual greetings (with an acquaintance)
  • 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.
  • 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.
  • peroxyacetyl nitrate — an unstable nitrogen compound, found in certain types of smog, that is an irritant, esp. to the eyes and to plants
  • personality disorder — any of a group of mental disorders characterized by deeply ingrained maladaptive patterns of behavior and personality style, which are usually recognizable as early as adolescence and are often lifelong in duration.
  • phenyldiethanolamine — a white, crystalline, slightly water-soluble substance, C 1 0 H 1 5 NO 2 , used in the manufacture of dyes and in organic synthesis.
  • phenylpropyl acetate — a colorless, water-insoluble liquid, C 1 0 H 1 2 O 2 , used chiefly in perfumery.
  • photophosphorylation — phosphorylation that utilizes light as a source of energy, as in the formation of ATP from ADP and phosphorus during photosynthesis.
  • 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)
  • physical examination — an examination, usually by a physician, of a person's body in order to determine his or her state of health or physical fitness, as for military service or participation in a sport.
  • physical meteorology — the branch of meteorology dealing with the study of optical, electrical, acoustical, and thermodynamic phenomena in the atmosphere, including the physics of clouds and precipitation.
  • planetary precession — the small component of the precession of the equinoxes contributed by the motion of the ecliptic, the change in orientation of the plane of the earth's orbit being produced by the gravitational attraction of the planets.
  • play catch-up (ball) — to try to equal or surpass one's opponent in competition, as a ballgame, in which one is behind
  • play merry hell with — to disturb greatly; disrupt
  • play pass-the-parcel — to try to avoid a responsibility, or blame, by passing it on to someone else
  • polyanthus narcissus — a Eurasian amaryllidaceous plant, Narcissus tazetta, having clusters of small yellow or white fragrant flowers
  • portal-to-portal pay — payment, as to a miner or factory worker, that includes compensation for time spent on the employer's premises in preparation for a work shift, in travel from the entrance to the assigned work area and back, etc.: Because workers must change their clothes and pick up tools prior to the work shift, they are demanding portal-to-portal pay.
  • portrait photography — the activity or art of taking portrait photos
  • post-synchronization — the recording of dialogue and sound effects in synchronization with the picture after the film has been shot.
  • postal delivery zone — zone (def 10).
  • powhatan confederacy — a network of Algonquian-speaking Indian settlements in Virginia that was ruled by Powhatan.
  • preservation society — a society dedicated to the preservation of something, especially a building, environment, or animal
  • presidential primary — a direct primary for the selection of state delegates to a national party convention and the expression of preference for a U.S. presidential nominee.
  • primary optical area — a point in or toward the upper left-hand corner of a printed page, advertisement, or the like, looked at first in reading. Abbreviation: POA.
  • primary spermatocyte — a male germ cell (primary spermatocyte) that gives rise by meiosis to a pair of haploid cells (secondary spermatocytes) that give rise in turn to spermatids.
  • primitive polynomial — a polynomial that has content equal to 1. Compare content1 (def 11a).
  • priority inheritance — (parallel)   A technique for avoiding priority inversion by temporarily raising the prioriry of all processes that want to access a shared resource to the highest priority level of any of them. Priority inversion occurs where a low priority process, L is holding a resource required by a high priority process, H, but L is not running because a medium priority process, M is running. Under priority inheritance, L temporarily inherits H's priority, allowing L to run and release the resource H is waiting for. For example, an ambulance (H) is stuck behind a lorry (L) waiting at a junction (the shared resource) for a gap in a line of cars (M) using the junction. Applying priority inheritance, the cars give way to the lorry as they would to the ambulance, thus allowing the lorry and then the ambulance to use the junction.
  • probability function — the function the values of which are probabilities of the distinct outcomes of a discrete random variable
  • property speculation — the buying or selling of property in the hope of deriving capital gains
  • proprietary medicine — a drug or agent manufactured and distributed under a trade name
  • propylphenyl acetate — phenylpropyl acetate.
  • prosecuting attorney — the public officer in a county, district, or other jurisdiction charged with carrying on the prosecution in criminal proceedings.
  • prothonotary warbler — a wood warbler, Protonotaria citrea, of the eastern U.S., having an orange-yellow head and underparts, and bluish-gray wings and tail.
  • pseudoparenchymatous — (in certain fungi and red algae) a compact mass of tissue, made up of interwoven hyphae or filaments, that superficially resembles plant tissue.
  • psychiatric hospital — institution treating mental disorders
  • psychological moment — the proper or critical time for achieving a desired result: She found the right psychological moment to make her request.
  • pyrenees-atlantiques — a department in SW France. 2978 sq. mi. (7710 sq. km). Capital: Pau.
  • pythagoras's theorem — (mathematics)   The theorem of geometry, named after Pythagoras, of Samos, Ionia, stating that, for a right-angled triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. I.e. if the longest side has length A and the other sides have lengths B and C (in any units), A^2 = B^2 + C^2 (2004-02-12)
  • quantum cryptography — a method of coding information based on quantum mechanics, which is said to be unbreakable
  • rapid transit system — a rail or other system providing rapid public transport
  • recreational therapy — therapy by means of recreational activities engaged in by the patient
  • relative probability — a measure or estimate of the degree of confidence one may have in the occurrence of an event, defined as the limit of the proportion observed in a sample as the sample size tends to infinity
  • respiratory quotient — the ratio of the amount of carbon dioxide released by the lungs to the amount of oxygen taken in during a given period.
  • rocky mountain sheep — bighorn.
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