23-letter words containing p, r
- four colour map theorem — (mathematics, application) (Or "four colour theorem") The theorem stating that if the plane is divided into connected regions which are to be coloured so that no two adjacent regions have the same colour (as when colouring countries on a map of the world), it is never necessary to use more than four colours. The proof, due to Appel and Haken, attained notoriety by using a computer to check tens of thousands of cases and is thus not humanly checkable, even in principle. Some thought that this brought the philosophical status of the proof into doubt. There are now rumours of a simpler proof, not requiring the use of a computer. See also chromatic number
- free-enterprise economy — an economy characterized by free enterprise
- frictional unemployment — those people who are in the process of moving from one job to another and who therefore appear in the unemployment statistics collected at any given time
- frozen food compartment — a compartment of a refrigerator or fridge-freezer for the storage of frozen food
- function graph language — (language) (FGL) The machine language for the AMPS (Applicative Multi-Processing System) proposed by Robert Keller, Gary Lindstrom and Suhas Patil at the University of Utah.
- gastroesophageal reflux — a chronic condition in which acid from the stomach flows back into the lower esophagus, causing pain or tissue damage.
- german baptist brethren — Church of the Brethren.
- get/build your hopes up — If you tell someone not to get their hopes up, or not to build their hopes up, you are warning them that they should not become too confident of progress or success.
- give something a rub-up — to smooth or polish something
- graphical kernel system — (graphics, standard) (GKS) The widely recognised standard ANSI X3.124 for graphical input/output. GKS is worked on by the ISO/IEC group JTC1/SC24. It provides applications programmers with standard methods of creating, manipulating, and displaying or printing computer graphics on different types of computer graphics output devices. It provides an abstraction to save programmers from dealing with the detailed capabilities and interfaces of specific hardware. GKS defines a basic two-dimensional graphics system with: uniform input and output primitives; a uniform interface to and from a GKS metafile for storing and transferring graphics information. It supports a wide range of graphics output devices including such as printers, plotters, vector graphics devices, storage tubes, refresh displays, raster displays, and microfilm recorders.
- greater prairie chicken — either of two North American gallinaceous birds of western prairies, Tympanuchus cupido (greater prairie chicken) or T. pallidicinctus (lesser prairie chicken) having rufous, brown, black, and white plumage.
- greater spotted dogfish — a cat shark found in the Northeast Atlantic, Scyliorhinus stellaris
- haleakala national park — a national park on Maui, Hawaii: site of 21-mile (34-km) diameter volcanic crater. 43 sq. mi. (111 sq. km).
- hate-driven development — (programming, humour) A play on test-driven development for use when a piece of code is not necessarily broken but you hate the way it is written so much that you feel compelled to rewrite it.
- have struck/hit paydirt — If you say that someone has struck paydirt or has hit paydirt, you mean that they have achieved sudden success or gained a lot of money very quickly.
- higher national diploma — a work-related higher education qualification, taking two years full-time.
- hire purchase agreement — an agreement between a seller and a buyer for the buyer to purchase something on hire purchase
- hook-and-ladder company — a company of firefighters equipped with a hook-and-ladder truck.
- human rights campaigner — a person who campaigns for human rights
- hypergeometric equation — a differential equation of the form, (x 2 − x) d 2 y / d 2 x + [(a+b +1) x−c ] dy/dx + abx =0, where a, b, and c are arbitrary constants.
- hypergeometric function — a function that is a solution to a hypergeometric equation.
- hypobetalipoproteinemia — (pathology) A low level of betalipoprotein (low-density lipoprotein) in the bloodstream.
- hypothetical imperative — (esp in the moral philosophy of Kant) any conditional rule of action, concerned with means and ends rather than with duty for its own sake
- in a manner of speaking — a way of doing, being done, or happening; mode of action, occurrence, etc.: I don't like the manner in which he complained.
- in the arms of morpheus — sleeping
- indeterminacy principle — uncertainty principle.
- industrial psychologist — a person who studies human behaviour and cognitive processes in relation to the working environment
- informatics corporation — (company) Renamed to Sterling Software Corp.
- initial public offering — An initial public offering is the first offering of stock when a company goes public.
- interference microscope — a microscope that utilizes light interference phenomena to create two superimposed images of an object, making possible the observation of transparent objects without using the staining technique.
- internet monthly report — (IMR) Publication designed to communicate to the Internet Research Group the accomplishments, milestones reached, or problems discovered by the participating organisations.
- internet public library — (IPL) A project at the University of Michigan School of Information and Library Studies to provide an on-line, 24 hour public library, chaired by an assemblage of librarians and information industry professionals. The library aims to provide library services to a target audience estimated to number 1/4 of the entire American population by the end of the century. The Internet Public Library is scheduled to go on-line in March 1995. Among the first services will be on-line reference; youth services; user education; and professional services for librarians. Mailing list: [email protected]
- invertible counterpoint — counterpoint in which the voices, while retaining their original form, may be interchanged above or below one another in any order.
- ivory-billed woodpecker — a large, nearly extinct, black and white woodpecker, Campephilus principalis, of the southern U.S. and Cuba, having an ivory-colored bill.
- joint test action group —
- keep (a person) company — to stay with (a person) so as to provide companionship
- keep sb at arm's length — If you keep someone at arm's length, you avoid becoming too friendly or involved with them.
- keep sth under your hat — If you tell someone to keep a piece of information under their hat, you are asking them not to tell anyone else about it.
- kick against the pricks — to hurt oneself by struggling against something in vain
- l'apres-midi d'un faune — L'Après-midi d'un Faune.
- lead replacement petrol — a less toxic fuel introduced in 2000 for cars requiring leaded petrol
- lead up the garden path — a plot of ground, usually near a house, where flowers, shrubs, vegetables, fruits, or herbs are cultivated.
- lesser peach tree borer — the larva of a clearwing moth, Synanthedon pictipes, distributed throughout the eastern U.S. and Canada but most prevalent in the South, that burrows into the injured trunks and branches of stone fruit trees.
- letter-quality printing — high-quality output in printed form from a printer linked to a word processor
- lingual protrusion lisp — a speech defect consisting in pronouncing s and z like or nearly like the th- sounds of thin and this, respectively.
- liquefied petroleum gas — a mixture of various petroleum gases, esp propane and butane, stored as a liquid under pressure and used as an engine fuel
- long-horned grasshopper — any of numerous insects of the family Tettigoniidae, having long, threadlike antennae and well-developed stridulating organs on the forewings of the male.
- lossy audio compression — (audio, compression) Any audio compression algorithm which does not retain every bit of data but only reproduces a signal that sounds more or less like the original. Examples are MP1, MP2, MP3, AAC.
- low-density lipoprotein — a plasma protein that is the major carrier of cholesterol in the blood: high levels are associated with atherosclerosis. Abbreviation: LDL.
- magneto-encephalography — a record of the magnetic field of the brain. Abbreviation: MEG.