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20-letter words containing a, i, l, n

  • polyanthus narcissus — a Eurasian amaryllidaceous plant, Narcissus tazetta, having clusters of small yellow or white fragrant flowers
  • 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.
  • postal delivery zone — zone (def 10).
  • postnatal depression — a form of clinical depression that occurs in mothers after the birth of a baby
  • 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.
  • potential difference — voltage
  • 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.
  • prepositional phrase — a phrase consisting of a preposition, its object, which is usually a noun or a pronoun, and any modifiers of the object, as in the gray desk I use.
  • prescription glasses — corrective spectacles
  • 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.
  • primitive polynomial — a polynomial that has content equal to 1. Compare content1 (def 11a).
  • prince edward island — an island in the Gulf of St. Lawrence, forming a province of Canada: 2184 sq. mi. (5655 sq. km). Capital: Charlottetown.
  • prince william sound — a sound in the Gulf of Alaska, on the S coast of Alaska: S end of Trans-Alaska oil pipeline at port of Valdez.
  • probability function — the function the values of which are probabilities of the distinct outcomes of a discrete random variable
  • programming language — a high-level language used to write computer programs, as COBOL or BASIC, or, sometimes, an assembly language.
  • 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.
  • proportional spacing — a feature of some typewriters and other output devices whereby the space allotted to each character is determined by the width of the character
  • psychological moment — the proper or critical time for achieving a desired result: She found the right psychological moment to make her request.
  • 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
  • pyrenees-atlantiques — a department in SW France. 2978 sq. mi. (7710 sq. km). Capital: Pau.
  • pyroligneous alcohol — methyl alcohol.
  • qualitative analysis — the analysis of a substance in order to ascertain the nature of its chemical constituents.
  • qualitative identity — the relation that holds between two relata that have properties in common. This term is used to distinguish many uses of the words identical or same in ordinary language from strict identity or numerical identity
  • quantum field theory — any theory in which fields are treated by the methods of quantum mechanics; each field can then be regarded as consisting of particles of a particular kind, which may be created and annihilated.
  • quasi-constitutional — of or relating to the constitution of a state, organization, etc.
  • queen elizabeth land — an area of British Antarctic Territory, situated south of Weddell Sea and between longitudes 20°W and 80°W, stretching from Filchner-Ronne Ice Shelf to the South Pole. Area: 437 000 sq km (169 000 sq miles)
  • rachel louise carson — Christopher ("Kit") 1809–68, U.S. frontiersman and scout.
  • radial triangulation — triangulation based upon lines radiating from the center of each of two overlapping photographs to certain objects appearing on each photograph.
  • raise one's glass to — to drink the health of; drink a toast to
  • rankine-cycle engine — a type of steam engine involving a continuous cycle of vaporization of liquid and condensation back to liquid in a sealed system: developed experimentally for use in automobiles to reduce polluting emissions, utilize cheaper fuels, etc.
  • rattlesnake plantain — any of several low, terrestrial orchids, as Goodyera repens, of northern temperate regions, having a basal rosette of leaves with white veins and a one-sided spike of white flowers.
  • read-eval-print loop — (language, LISP, programming)   (REPL) A programming structure within LISP which repeatedly reads a form from the user, evaluates it, and displays the result. A read-eval-print loop forms the basis of the Top-Level shell that programmers of the LISP family of languages interact with. In many dialects of LISP a very simple REPL could be implemented as: (loop (print (eval (read)))). (2003-06-23)
  • real-time processing — data-processing by a computer which receives constantly changing data, such as information relating to air-traffic control, travel booking systems, etc, and processes it sufficiently rapidly to be able to control the source of the data
  • receivables turnover — A receivables turnover is a measure of cash flow that is calculated by dividing net credit sales by average accounts receivable.
  • reciprocal insurance — insurance in which members of a reciprocal exchange, acting through an attorney-in-fact, insure themselves and each other.
  • reconcile an account — If you reconcile an account, you compare the items in a bank statement, credit card statement, or vendor statement with the entries on your books and make sure that the statement and books match.
  • recreational therapy — therapy by means of recreational activities engaged in by the patient
  • recreational vehicle — a van or utility vehicle used for recreational purposes, as camping, and often equipped with living facilities. Abbreviation: RV.
  • red-winged blackbird — a North American blackbird, Agelaius phoeniceus, the male of which is black with scarlet patches, usually bordered with buff or yellow, on the bend of the wing.
  • refracting telescope — an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens set into one end of a tube and an adjustable eyepiece or combination of lenses set into the other end of a tube that slides into the first and through which the enlarged object is viewed directly; the other form (reflecting telescope) has a concave mirror that gathers light from the object and focuses it into an adjustable eyepiece or combination of lenses through which the reflection of the object is enlarged and viewed. Compare radio telescope.
  • refuse disposal unit — a unit or part of a sink that disposes of waste food, etc, by grinding
  • regenerative cooling — Physics. a method of cooling a gas, utilizing the rapid expansion of a compressed portion of the gas, before it becomes liquid, to cool the remainder.
  • regional development — aid-giving to poorer areas or countries
  • relative conjunction — a conjunction that introduces a relative clause
  • relative deprivation — the perception of an unfair disparity between one's situation and that of others.
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