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18-letter words containing r, a, c, o

  • fixed-radio access — Wireless Local Loop
  • formal equivalence — the relation that holds between two open sentences when their universal closures are materially equivalent
  • forward compatible — forward compatibility
  • fourth commandment — “Remember the sabbath day, to keep it holy”: fourth of the Ten Commandments.
  • fracture toughness — The fracture toughness of a material is how likely it is to resist fracture.
  • frame of reference — a structure of concepts, values, customs, views, etc., by means of which an individual or group perceives or evaluates data, communicates ideas, and regulates behavior.
  • francisco coronado — Francisco Vásquez de [frahn-thees-kaw bahs-keth th e,, frahn-sees-kaw bahs-kes] /frɑnˈθis kɔ ˈbɑs kɛθ ðɛ,, frɑnˈsis kɔ ˈbɑs kɛs/ (Show IPA), 1510–54? Spanish explorer in North America.
  • frederick douglass — Frederick, 1817–95, U.S. ex-slave, abolitionist, and orator.
  • ftp software, inc. — (company)   Developers of the original PC/TCP Packet Driver specification. Address: 26 Princess St. Wakefield, MA 01880-3004. Telephone: +1 (617) 246 0900.
  • functional program — (language)   A program employing the functional programming approach or written in a functional language.
  • funeral procession — ceremonial cortège at a burial
  • galvanic corrosion — Galvanic corrosion is a type of corrosion caused by bringing together two different metals, one of which corrodes more rapidly than it would alone while the other corrodes less rapidly.
  • garbage collection — (programming)   (GC) The process by which dynamically allocated storage is reclaimed during the execution of a program. The term usually refers to automatic periodic storage reclamation by the garbage collector (part of the run-time system), as opposed to explicit code to free specific blocks of memory. Automatic garbage collection is usually triggered during memory allocation when the amount free memory falls below some threshold or after a certain number of allocations. Normal execution is suspended and the garbage collector is run. There are many variations on this basic scheme. Languages like Lisp represent expressions as graphs built from cells which contain pointers and data. These languages use automatic dynamic storage allocation to build expressions. During the evaluation of an expression it is necessary to reclaim space which is used by subexpressions but which is no longer pointed to by anything. This reclaimed memory is returned to the free memory pool for subsequent reallocation. Without garbage collection the program's memory requirements would increase monotonically throughout execution, possibly exceeding system limits on virtual memory size. The three main methods are mark-sweep garbage collection, reference counting and copying garbage collection. See also the AI koan about garbage collection.
  • gas chromatography — a chromatograph used for the separation of volatile substances.
  • gas-cooled reactor — a nuclear reactor using a gas as the coolant. In the Mark I type the coolant is carbon dioxide, the moderator is graphite, and the fuel is uranium cased in magnox
  • general confession — a prayer confessing sins
  • general contractor — a person who contracts to construct a building or buildings, for a stipulated sum, in accordance with certain plans and specifications, or to remodel or build an addition to a building
  • general precession — the precession that results from both lunisolar precession and planetary precession; precession of the equinoxes.
  • genetic algorithms — genetic algorithm
  • gensym corporation — (company)   A company that supplies software and services for intelligent operations management. Common applications include quality management, process optimisation, dynamic scheduling, network management, energy and environmental management, and process modelling and simulation. Their products include G2.
  • gentleman-commoner — (formerly) a member of a class of commoners enjoying special privileges at Oxford University.
  • geometrical optics — the branch of optics dealing with light as rays, especially in the study of the effects of lenses and mirrors on light beams and of their combination in optical instruments.
  • glyceryl trioleate — olein.
  • golden bantam corn — a horticultural variety of sweet corn having yellow kernels.
  • gooseneck barnacle — goose barnacle
  • grand canyon state — Arizona (used as a nickname).
  • grand council fire — a formal gathering of camp fire members requiring a minimum attendance of three troops.
  • great expectations — a novel (1861) by Charles Dickens.
  • greater pichiciego — an armadillo, Burmeisteria retusa, similar to, but larger than, a pichiciego
  • green-backed heron — a small, American heron, Butorides striatus, having glossy green wings.
  • gregorian calendar — the reformed Julian calendar now in use, according to which the ordinary year consists of 365 days, and a leap year of 366 days occurs in every year whose number is exactly divisible by 4 except centenary years whose numbers are not exactly divisible by 400, as 1700, 1800, and 1900.
  • guidance counselor — advisor in schools
  • gulf of california — an arm of the Pacific Ocean, between Sonora and Lower California
  • gyromagnetic ratio — the ratio of the magnetic moment of a rotating charged particle to its angular momentum.
  • haemorrhagic fever — any of a group of fevers, such as Ebola virus disease and yellow fever, characterized by internal bleeding or bleeding into the skin
  • haulage contractor — a person or firm that transports goods by lorry
  • have a screw loose — a metal fastener having a tapered shank with a helical thread, and topped with a slotted head, driven into wood or the like by rotating, especially by means of a screwdriver.
  • health care worker — A health care worker is someone who works in a hospital or health centre.
  • heimlich manoeuvre — a technique in first aid to dislodge a foreign body in a person's windpipe by applying sudden upward pressure on the upper abdomen
  • helicopter station — a place where helicopters are kept in readiness for use
  • heteroscedasticity — (statistics) The property of a series of random variables of 'not' every variable having the same finite variance.
  • heteroskedasticity — Alternative spelling of heteroscedasticity.
  • hexachlorobiphenyl — (organic compound) Either of forty-two isomers of the polychlorinated biphenyl containing six chlorine atoms.
  • higher-order macro — A means of expressing certain higher-order functions in a first order language. Proposed by Phil Wadler. Higher-order macros cannot be recursive at the top level but they may contain recursive definitions. E.g. See partial evaluation.
  • hippocratic facies — the sallow facial expression, with listless staring eyes, often regarded as denoting approaching death
  • histomorphological — histology.
  • historical fiction — the genre of literature, film, etc., comprising narratives that take place in the past and are characterized chiefly by an imaginative reconstruction of historical events and personages.
  • historical geology — the branch of geology dealing with the history of the earth.
  • historical present — the present tense used in narrating a past event as if happening at the time of narration.
  • honorary secretary — a unpaid person who is one of the managers of an organization
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