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23-letter words containing a, c, h, e, r

  • drawing exchange format — (DXF) A file format for graphical information, similar to IGES. Commonly used by CAD systems like AutoCAD.
  • eastern orthodox church — Orthodox Church (def 1).
  • electroencephalographer — A specialist in electroencephalography.
  • electroencephalographic — Of or pertaining to electroencephalography or electroencephalographs.
  • electrophotographically — In an electrophotographic manner; by means of electrophotography.
  • electrostatic discharge — (hardware, testing)   (ESD) One kind of test that hardware usually has to pass to prove it is suitable for sale and use. The hardware must still work after is has been subjected to some level of electrostatic discharge. Some organisations have their own ESD requirements which hardware must meet before it will be considered for purchase. Different countries have different legal regulations about levels of ESD. See also Radio Frequency Interference, Electromagnetic Compatibility.
  • embarrassment of riches — If you say that someone has an embarrassment of riches, you mean that they have so many good things that these things are a problem.
  • encephalitis lethargica — a form of encephalitis, or sleeping sickness, epidemic in the period from 1915 to 1926
  • exchange rate mechanism — European financial system
  • execute channel program — (operating system)   (EXCP) An IBM system for low-level file access, where the programmer is completely responsible for providing a list of device-specific "channel comands" to be executed by I/O channels, control units and/or devices. The operating system will simply check the "CCW" chains for security purposes (access invalid memory or outside of file extents) and then schedule them for execution.
  • experimental psychology — the scientific study of the individual behaviour of man and other animals, esp of perception, learning, memory, motor skills, and thinking
  • extended graphics array — (hardware)   (XGA) An IBM display standard introduced in 1990. XGA supports a resolution of 1024 x 768 pixels with a palette of 256 colours, or 640 x 480 with high colour (16 bits per pixel). XGA-2 added 1024 x 768 support for high colour and higher refresh rates, improved performance, and supports 1360 x 1024 in 16 colours. XGA is probably not the same as 8514-A. See also VESA's EVGA released at a similar time.
  • extended reach drilling — Extended reach drilling is drilling a well horizontally to at least twice its vertical depth.
  • extravehicular activity — the act or an instance of floating and manoeuvring in space, outside but attached by a lifeline to a spacecraft
  • fall between the cracks — to fail to fit into a given agenda or program
  • fall through the cracks — to break without complete separation of parts; become fissured: The plate cracked when I dropped it, but it was still usable.
  • fendalton shopping cart — a four-wheel drive recreational vehicle
  • foreign exchange market — the market for the international buying, selling and trading of currencies
  • foreign exchange office — (communications)   (FXO) An analog telephone plug on a handset that receives POTS service from the telephone exchange ("central office") via a Foreign eXchange Subscriber socket and provides on-hook/off-hook indication to the exchange.
  • forward exchange market — a market for contracts that specify the exchange rate of a currency to be delivered at a later date
  • 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
  • fraunhofer gesellschaft — (company)   (FhG, FhG IIS, Institut für Integrierte Schaltungen) A german company, named after the physicist. IIS is Integrated Circuit Institute. FhG are known for their research on audio compression, especially MPEG-1 Layer-3 (MP3).
  • 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.
  • german southwest africa — a former name of Namibia.
  • grand duchess charlotte — Grand Duchess (Charlotte Aldegonde Elise Marie Wilhelmine) 1896–1985, sovereign of Luxembourg 1919–64.
  • grant-maintained school — a school funded directly by central government
  • 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.
  • harvard mark ii machine — (computer, history)   A relay-based computer designed and built by Howard Aiken, with support from IBM, for the United States Navy's Naval Proving Ground, between 1942 - 1947. The Harvard Mark II was the second in a series of four electro-mechanical computers that were forerunners of the ENIAC.
  • have one's act together — anything done, being done, or to be done; deed; performance: a heroic act.
  • have one's work cut out — to have as much work as one can manage
  • 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.
  • heterogeneous catalysis — Heterogeneous catalysis is catalysis in which the catalyst does not take part in the reaction that it increases.
  • hexagonal cross-section — If a kelly has a hexagonal cross-section, it has a surface area with six equal sides, when looked at as if has been sliced through.
  • hierarchical navigation — (web)   On a web page, any type of menu whose hierarchical structure matches that of the site to which the page belongs. A hierarchical navigation menu allows the user to jump ("navigate") directly to a section of the site several levels below the top. The menu may present only a fixed number of levels rather than the whole structure.
  • hire purchase agreement — an agreement between a seller and a buyer for the buyer to purchase something on hire purchase
  • hollerithabetical order — (algorithm)   Sorted into the order a standard Hollerith card sorting machine produces, with special characters interleaved within the alphabet.
  • 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
  • hunchback of notre dame — French Notre Dame de Paris. a novel (1831) by Victor Hugo.
  • 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.
  • 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
  • icosidodecadodecahedron — A polyhedron having 44 faces, 60 vertices, 120 edges, 12 self intersected faces and 12 nonconvex faces.
  • interchange file format — (file format)   (IFF, full name "EA IFF 1985") A generic file format published by Electronic Arts as an open standard. IFF is chunk-based and hierarchical so files can include other files. It is easily extensible and an all round Good Idea. An IFF file starts with one of the following "group IDs": 'FORM', 'LIST' or 'CAT '. This is followed by an unsigned 32-bit number of bytes in the remainder of the file. Then comes an ID that indicates which type of IFF file this is. The main image type is ILBM, audio is either AIFF or 8SVX, animations are ANIM etc. An IFF file will probably have a filename extension related to this file type stored in the file. The rest of the file is divided into chunks each of which also has a four-byte header and byte count.
  • intermediate technology — technology which combines sophisticated ideas with cheap and readily available materials, esp for use in developing countries
  • irish christian brother — Brother of the Christian Schools (def 2).
  • kick against the pricks — to hurt oneself by struggling against something in vain
  • kinetic theory of gases — a theory that the particles in a gas move freely and rapidly along straight lines but often collide, resulting in variations in their velocity and direction. Pressure is interpreted as arising from the impacts of these particles with the walls of a container.
  • lady chatterley's lover — a novel (1928) by D. H. Lawrence.
  • largemouth (black) bass — a black bass (Micropterus salmoides) found in warm, sluggish waters
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