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21-letter words containing a, d, s, p

  • 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.
  • premium savings bonds — (in Britain) bonds issued by the Treasury since 1956 for purchase by the public. No interest is paid but there is a monthly draw for cash prizes of various sums
  • pro-industrialization — the large-scale introduction of manufacturing, advanced technical enterprises, and other productive economic activity into an area, society, country, etc.
  • progressive education — any of various reformist educational philosophies and methodologies since the late 1800s, applied especially to elementary schools, that reject the rote recitation and strict discipline of traditional, single-classroom teaching, favoring instead more stimulation of the individual pupil as well as group discussion, more informality in the classroom, a broader curriculum, and use of laboratories, gymnasiums, kitchens, etc., in the school.
  • protest demonstration — a manifestation of protest by public rally, parade, etc
  • pseudohermaphroditism — an individual having internal reproductive organs of one sex and external sexual characteristics resembling those of the other sex or being ambiguous in nature. Compare hermaphrodite (def 1).
  • psychopathic disorder — (in England, according to the Mental Health Act 1983) a persistent disorder or disability of mind which results in abnormally aggressive or seriously irresponsible conduct on the part of the person concerned
  • public address system — loudspeaker
  • public administration — the implementation of public policy, largely by the executive branch.
  • 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 code modulation — a form of modulation that transforms a wave-form, as an audio signal, into a binary signal in which information is conveyed by a coded order of pulses for transmission, storage on a disk, or processing by a computer. Abbreviation: PCM.
  • pulse-code modulation — a form of modulation that transforms a wave-form, as an audio signal, into a binary signal in which information is conveyed by a coded order of pulses for transmission, storage on a disk, or processing by a computer. Abbreviation: PCM.
  • pulse-time modulation — radio transmission in which the carrier is modulated to produce a series of pulses timed to transmit the amplitude and pitch of a signal. Abbr.: PTM.
  • purchasing department — the group of staff within an organization that is responsible for buying goods or products
  • push up (the) daisies — to be dead and buried
  • put in the hard yards — to make a great effort to achieve an end
  • ralph roister doister — a play (1553?) by Nicholas Udall: the earliest known English comedy.
  • reading comprehension — a text that students use to help them improve their reading skills, by reading it and answering questions relating to the text. Sometimes used as a test or examination of reading skills. A reading comprehension can be in the student's own or another language
  • real-estate developer — a person who buys and develops houses, buildings, and land in order to sell them and make a profit from them
  • redlegged grasshopper — a migratory grasshopper, Melanoplus femur-rubrum, of the southwestern and midwestern U.S., having reddish skin on the underside of the hind legs: an agricultural pest.
  • residual unemployment — the unemployment that remains in periods of full employment, as a result of those mentally, physically, or emotionally unfit to work
  • roodepoort-maraisburg — a city in S Transvaal, in the NE Republic of South Africa.
  • sampling distribution — the distribution of a statistic based on all possible random samples that can be drawn from a given population.
  • sanitation department — the department of local government responsible for collecting and disposing of refuse
  • sao bernardo do campo — a city in SE Brazil, SE of São Paulo.
  • sao jose do rio preto — a city in SE Brazil, NW of São Paulo.
  • sao tome and principe — Democratic Republic of, a republic in W Africa, comprising the islands of São Tomé and Príncipe, in the Gulf of Guinea, N of the equator: a former overseas province of Portugal; gained independence in 1975. 372 sq. mi. (964 sq. km). Capital: São Tomé.
  • scalar triple product — the volume of the parallelepiped defined by three given vectors, u, v, and w, usually represented as u·v 1 (v×w), [ uvw ], or (uvw), where × denotes a cross product and · denotes an inner product.
  • 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.
  • seven-segment display — (electronics)   (SSD) A kind of display element consisting of seven independently controllable lines arranged as a rectangular figure eight. A seven-segment display is the simplest device that can display any of the digits zero to nine (and some other characters) by lighting different combinations of lines. They are often seen in electronic calculators or measuring equipment.
  • sheppard's correction — a method of correcting the bias in standard deviations and higher moments of distributions that arises from grouping values of the variable.
  • sinusoidal projection — an equal-area projection in which parallels are straight lines spaced at regular intervals, the central meridian is a straight line one-half the length of the equator, and the other meridians are curves symmetrical to the central meridian.
  • snappy video snapshot — (hardware)   (registered trademark) A frame grabber for the IBM PC designed and marketed by Play, Inc..
  • snr bandwidth product — (communications)   The integral of the SNR over frequency. The SNR bandwidth product is an important limit in the capacity of a communication channel.
  • sodium metabisulphite — an inorganic compound with the chemical formula Na2S2O5 that is used as a preservative, antioxidant and disinfectant
  • special correspondent — a journalist who covers stories firsthand from a war zone
  • spherical coordinates — Usually, spherical coordinates. any of three coordinates used to locate a point in space by the length of its radius vector and the angles this vector makes with two perpendicular polar planes.
  • spotted alfalfa aphid — a pale yellowish aphid, Therioaphis maculata, of the southern U.S., especially west of the Mississippi River, that is marked with black spots and has fine spines on its back: a pest mainly of alfalfa and some other legumes, as clover.
  • steady-state response — A steady-state response is the behavior of a circuit after a long time when steady conditions have been reached after an external excitation.
  • step-down transformer — a device that transfers an alternating current from one circuit to one or more other circuits with a decrease of voltage
  • stock list department — (in an American stock exchange) the department dealing with monitoring compliance with its listing requirements and rules
  • student participation — the extent to which students participate or involve themselves in a class, course, etc
  • the antipodes islands — a group of small uninhabited islands in the South Pacific, southeast of and belonging to New Zealand. Area: 62 sq km (24 sq miles)
  • the stars and stripes — the national flag of the United States of America, consisting of 50 white stars representing the present states on a blue field and seven red and six white horizontal stripes representing the original states
  • thermal decomposition — Thermal decomposition is the process in which a chemical species breaks down when its temperature is increased.
  • third-party insurance — insurance that compensates for a loss to a party other than the insured for which the insured is liable.
  • threshold wage policy — a policy whereby wages are increased in accordance with inflation
  • to play second fiddle — If you play second fiddle to someone, your position is less important than theirs in something that you are doing together.
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