21-letter words containing l, a, y, e, r
- peroxydisulfuric acid — persulfuric acid (def 2).
- personality inventory — a questionnaire designed to measure personality types or characteristics.
- picture quality scale — (graphics) (PQS) A system for rating image quality based upon features of images that affect their perception by the human eye, rather than the traditional signal-to-noise ratio which examines differences for every single pixel.
- piezoelectric crystal — a crystal, such as quartz, that produces a potential difference across its opposite faces when under mechanical stress
- place of safety order — (in Britain) under the Children and Young Persons Act 1969, an order granted by a justice to a person or agency granting authority to detain a child or young person and take him or her to a place of safety for not more than 28 days, because of the child's actual or likely ill-treatment or neglect, etc
- play one's cards well — to use one's resources in the most effective manner
- play russian roulette — take a foolish risk
- pneumoencephalography — encephalography.
- politically incorrect — not politically correct; potentially offensive to a particular group of people: politically incorrect jokes.
- polygenic inheritance — the heredity of complex characters that are determined by a large number of genes, each one usually having a relatively small effect.
- posterior probability — the probability assigned to some parameter or to an event on the basis of its observed frequency in a sample, and calculated from a prior probability by Bayes' theorem
- prader-willi syndrome — a congenital condition characterized by obsessive eating, obesity, learning difficulties, and small genitalia
- premenstrual syndrome — a complex of physical and emotional changes, including depression, irritability, appetite changes, bloating and water retention, breast soreness, and changes in muscular coordination, one or more of which may be experienced in the several days before the onset of menstrual flow. Abbreviation: PMS.
- privacy enhanced mail —
- psychological warfare — the use of propaganda, threats, and other psychological techniques to mislead, intimidate, demoralize, or otherwise influence the thinking or behavior of an opponent.
- public address system — loudspeaker
- public-address system — a combination of electronic devices that makes sound audible via loudspeakers to many people, as in an auditorium or out of doors.
- pulse height analyser — a multichannel analyser that sorts pulses into selected amplitude ranges
- pulse height analyzer — an instrument that records or counts an electrical pulse if its amplitude falls within specified limits: used in nuclear physics research for the determination of energy spectra of nuclear radiations
- quality point average — grade point average.
- rayleigh distribution — (mathematics) A curve that yields a good approximation to the actual labour curves on software projects.
- real estate liability — Real estate liability is liability for risks that come from owning real estate.
- real operating system — (operating system, abuse) The sort the speaker is used to. People from the BSDophilic academic community are likely to issue comments like "System V? Why don't you use a *real* operating system?", people from the commercial/industrial Unix sector are known to complain "BSD? Why don't you use a *real* operating system?", and people from IBM object "Unix? Why don't you use a *real* operating system?" See holy wars, religious issues, proprietary, Get a real computer!.
- rectangular hyperbola — a hyperbola with perpendicular asymptotes
- redevelopment company — a private corporation or a public agency that stimulates the improvement of land, as through a building project subject to certain designs and controls, by financing, selling, or leasing such real estate to interested buyers or lessees.
- referential integrity — (database) A collection of properties which should be possessed by data in a relational database. For example, in a database of family members, if we enter A as a spouse of B, we should also enter B as a spouse of A. Similarly, if we remove one end of the relationship we should also remove the other.
- relative permeability — the ratio of the permeability of a medium to that of free space
- relative permittivity — Electricity. the ratio of the flux density produced by an electric field in a given dielectric to the flux density produced by that field in a vacuum.
- requirements analysis — (project) The process of reviewing a business's processes to determine the business needs and functional requirements that a system must meet.
- residual unemployment — the unemployment that remains in periods of full employment, as a result of those mentally, physically, or emotionally unfit to work
- reverse polish syntax — postfix notation
- rob peter to pay paul — to take something from (someone) by unlawful force or threat of violence; steal from.
- royal victorian order — (in Britain) an order of chivalry founded by Queen Victoria in 1896, membership of which is conferred for special services to the sovereign
- saint lawrence seaway — a series of channels, locks, and canals between Montreal and the mouth of Lake Ontario, a distance of 182 miles (293 km), enabling most deep-draft vessels to travel from the Atlantic Ocean, up the St. Lawrence River, to all the Great Lakes ports: developed jointly by the U.S. and Canada.
- salam-weinberg theory — the electroweak theory.
- santa cruz water lily — a South American aquatic plant, Victoria cruziana, of the water lily family, having floating leaves from 2–5 feet (0.6–1.5 meters) and deep pink or red flowers.
- scarlet monkey flower — any of various plants belonging to the genus Mimulus, of the figwort family, as M. cardinalis (scarlet monkey flower) having spotted flowers that resemble a face.
- schlieren photography — a type of photography which records schlieren
- 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.
- seventeen-year locust — a cicada, Magicicada septendecim, of the eastern U.S., having nymphs that live in the soil, usually emerging in great numbers after 17 years in the North or 13 years in the South.
- social inquiry report — (in Britain) a report on a person and his or her circumstances, which may be required by a court before sentencing and is made by a probation officer or a social worker from a local authority social services department
- split-screen facility — a facility allowing different scenes to be shown on screen at the same time
- statutory declaration — a declaration made under statutory authority before a justice of the peace or commissioner for oaths which may in certain cases be substituted for a statement on oath
- sunday school teacher — someone who teaches at a Sunday school
- supplementary benefit — (formerly) an extra amount of money that is paid to someone by the government, in addition to their normal income. Replaced by income support in 1988
- systeme international — Système International d'Unités
- take sb/sth seriously — If you take someone or something seriously, you believe that they are important and deserve attention.
- tartarian honeysuckle — an Asian honeysuckle, Lonicera tatarica, having fragrant, white to pink flowers.
- 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.