20-letter words containing n, u, p, t, i, a
- population explosion — the rapid increase in numbers of a particular species, especially in the world's human population since the end of World War II, attributed to an accelerating birthrate, a decrease in infant mortality, and an increase in life expectancy.
- population inversion — a condition of matter in which more electrons are in a high energy state than in a lower energy state, as is required for the operation of a laser.
- population parameter — a quantity or statistical measure that, for a given population, is fixed and that is used as the value of a variable in some general distribution or frequency function to make it descriptive of that population: The mean and variance of a population are population parameters.
- potassium antimonate — a white, crystalline, slightly water-soluble powder, KSbO 3 , used chiefly as a pigment in paints.
- potassium binoxalate — a white, crystalline, hygroscopic, poisonous solid, KHC 2 O 4 , that is usually hydrated: used chiefly for removing ink stains, cleaning metal and wood, and in photography.
- pound cost averaging — a method of accumulating capital by investing a fixed sum in a particular security at regular intervals, in order to achieve an average purchase price below the arithmetic average of the market prices on the purchase dates
- premenstrual tension — Premenstrual tension is the same as premenstrual syndrome. The abbreviation PMT is often used.
- prenuptial agreement — A prenuptial agreement is a written contract made between a man and a woman before they marry, in which they state how their assets such as property and money should be divided if they get divorced.
- probability function — the function the values of which are probabilities of the distinct outcomes of a discrete random variable
- production agreement — a contract concerning the production or manufacture of something
- prohibited substance — a substance, such as a drug, etc, that is banned or forbidden by law or other authority
- property speculation — the buying or selling of property in the hope of deriving capital gains
- proportional counter — a radiation counter in which the strength of each electric pulse generated per count is proportional to the energy of the particle or photon producing the pulse, alpha particles producing a different electric pulse from beta rays.
- prosecuting attorney — the public officer in a county, district, or other jurisdiction charged with carrying on the prosecution in criminal proceedings.
- public administrator — an official of a city, county, or state government.
- punch a (time) clock — to insert a timecard into a time clock when coming to or going from work
- put in an appearance — the act or fact of appearing, as to the eye or mind or before the public: the unannounced appearance of dinner guests; the last appearance of Caruso in Aïda; her first appearance at a stockholders' meeting.
- pyrenees-atlantiques — a department in SW France. 2978 sq. mi. (7710 sq. km). Capital: Pau.
- queen of the prairie — a tall plant, Filipendula rubra, of the rose family, having branching clusters of pink flowers, growing in meadows and prairies.
- recuperative furnace — a furnace having its incoming air heated by exhaust gases, the passage of air and gases through the furnace being always in the same direction.
- refuse disposal unit — a unit or part of a sink that disposes of waste food, etc, by grinding
- requiescat (in pace) — may he or she rest (in peace)
- 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.
- rotations per minute — revolutions per minute
- santa cruz operation — (SCO) A supplier of Unix systems for Intel microprocessors. They supply Xenix and Open Desktop. Founded in 1979, SCO became a public company in May, 1993 and trades on the Nasdaq National Market System under the symbol SCOC. SCO maintains its world headquarters in Santa Cruz, California, USA; a European headquarters in Watford, England; a Government Systems Group in Reston, Virginia; and offices in Asia, Australia, Canada, Latin America, and throughout Europe and the United States. In February 1993, SCO acquired IXI Limited of Cambridge, England, the leading supplier of Unix System windowing software.
- soft gelatin capsule — A soft gelatin capsule is a type of capsule that is usually used to contain medicine in the form of liquid or powder, and which dissolves more quickly than a hard gelatin capsule.
- south american plate — a major tectonic division of the earth's crust, comprising the continent of South America and several ocean basins and bounded on the north by the Caribbean Plate, on the east by the Mid-Atlantic Ridge, on the west by a submarine trench that borders the western coast of the continent, and on the south by the Antarctic Plate.
- space-time continuum — Also called space-time continuum. the four-dimensional continuum, having three spatial coordinates and one temporal coordinate, in which all physical quantities may be located.
- specific conductance — conductivity (def 2).
- specific-conductance — conductivity (def 2).
- spontaneous abortion — miscarriage (def 1).
- spontaneous-abortion — Also called voluntary abortion. the removal of an embryo or fetus from the uterus in order to end a pregnancy.
- square of opposition — a diagrammatic representation of the opposition of categorical propositions.
- subscription library — a commercial lending library
- supersonic transport — a commercial jet airplane that can fly faster than the speed of sound. Abbreviation: SST.
- take up a collection — to get into one's hold or possession by voluntary action: to take a cigarette out of a box; to take a pen and begin to write.
- temperature gradient — rate of change of temperature with distance.
- therapeutic abortion — abortion performed when a woman's pregnancy endangers her health.
- to bring up the rear — If a person or vehicle is bringing up the rear, they are the last person or vehicle in a moving line of them.
- to keep your hand in — If you do something to keep your hand in, you practise a skill or hobby occasionally in order to remain fairly good at it.
- to make up your mind — If you make up your mind or make your mind up, you decide which of a number of possible things you will have or do.
- to spread your wings — If you spread your wings, you do something new and rather difficult or move to a new place, because you feel more confident in your abilities than you used to and you want to gain wider experience.
- tropical disturbance — a very weak, or incipient, tropical cyclone.
- tubing head pressure — The tubing head pressure is the pressure on the tubing, which is measured at the wellhead.
- united arab republic — a name given the union of Egypt and Syria from 1958 to 1961; after that, the official name of Egypt alone until 1971. Abbreviation: U.A.R.
- upper income bracket — a grouping of the highest earning tax payers
- war production board — the board (1942–45) that supervised and regulated the production and sale of matériel essential to the logistics of World War II. Abbreviation: WPB, W.P.B.
- working-capital fund — a fund established to finance operating activities in an industrial enterprise.