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15-letter words containing r, o, n, g

  • granulitization — the process whereby metamorphism acts on a rock and reduces it to crystalline grains
  • graph colouring — (application)   A constraint-satisfaction problem often used as a test case in research, which also turns out to be equivalent to certain real-world problems (e.g. register allocation). Given a connected graph and a fixed number of colours, the problem is to assign a colour to each node, subject to the constraint that any two connected nodes cannot be assigned the same colour. This is an example of an NP-complete problem. See also four colour map theorem.
  • graph reduction — A technique invented by Chris Wadsworth where an expression is represented as a directed graph (usually drawn as an inverted tree). Each node represents a function call and its subtrees represent the arguments to that function. Subtrees are replaced by the expansion or value of the expression they represent. This is repeated until the tree has been reduced to a value with no more function calls (a normal form). In contrast to string reduction, graph reduction has the advantage that common subexpressions are represented as pointers to a single instance of the expression which is only reduced once. It is the most commonly used technique for implementing lazy evaluation.
  • graviperception — the perception of gravity by plants
  • gravitationally — As a result of the force of gravity.
  • gravity anomaly — a deviation from the normal value of gravity at the earth's surface, caused by density differences at depth, for example those caused by a buried mineral body
  • great rebellion — English Civil War.
  • great recession — the protracted worldwide economic recession following the financial crisis of 2007–08
  • great synagogue — (according to Jewish tradition) a council of 120 members, established by Ezra, that directed the Jews chiefly in religious matters, c450–c200 b.c., and made significant contributions to the Jewish liturgy and Bible.
  • greater omentum — the peritoneal fold attached to the stomach and the colon and hanging over the small intestine.
  • grecian profile — a profile distinguished by the absence of the hollow between the upper ridge of the nose and the forehead, thereby forming a straight line.
  • green footprint — the impact of a building on the environment
  • green mountains — a mountain range in E North America, extending from Canada through Vermont into W Massachusetts: part of the Appalachian system. Highest peak: Mount Mansfield, 1338 m (4393 ft)
  • green's theorem — one of several theorems that connect an integral in n -dimensional space with one in (n − 1)-dimensional space.
  • greenbottle fly — any of several metallic-green blowflies, as Phaenicia sericata.
  • greenham common — a village in West Berkshire unitary authority, Berkshire; site of a US cruise missile base, and, from 1981, a camp of women protesters against nuclear weapons; although the base had closed by 1991 a small number of women remained until 2000
  • gregorian chant — the plain song or cantus firmus used in the ritual of the Roman Catholic Church.
  • gregorian water — a mixture of water, salt, ashes, and wine, blessed and sprinkled over the altar in the consecration of a church.
  • grey propaganda — propaganda that does not identify its source
  • grid networking — a type of computer networking that harnesses unused processing cycles of ordinary desktop computers to create a virtual supercomputer
  • griffith-joyner — Florence, known as Flojo. 1959–98, US sprinter, winner of two gold medals at the 1988 Olympic Games
  • grimes (golden) — a yellow autumn eating apple
  • grind to a halt — If a country's economy or something such as a process grinds to a halt, it gradually becomes slower or less active until it stops.
  • gros de londres — a cross-ribbed, silk dress fabric with ribs alternating in color or between coarse and fine yarn.
  • gross indecency — sexual offence
  • ground engineer — an engineer qualified and licensed to certify the airworthiness of an aircraft
  • ground landlord — a landlord who receives ground rent.
  • ground meristem — an area of primary meristematic tissue, emerging from and immediately behind the apical meristem, that develops into the pith and the cortex.
  • ground observer — a person stationed in a position on the ground to watch, follow, and report on flights of aircraft, especially of enemy aircraft.
  • ground squirrel — any of several terrestrial rodents of the squirrel family, as of the genus Citellus and chipmunks of the genus Tamias. circ;circ;
  • ground-breaking — the act or ceremony of breaking ground for a new construction project.
  • groundbreakings — Plural form of groundbreaking.
  • groundwood pulp — wood pulp consisting of groundwood that has not been cooked or chemically treated, used for making newsprint and other poorer grades of paper.
  • group insurance — life, accident, or health insurance available to a group of persons, as the employees of a company, under a single contract, usually without regard to physical condition or age of the individuals.
  • growth industry — an industry that is experiencing rapid growth
  • guaranteed bond — a bond issued by a corporation in which payment of the principal, interest, or both is guaranteed by another corporation.
  • guard of honour — A guard of honour is an official parade of troops, usually to celebrate or honour a special occasion, such as the visit of a head of state.
  • guest of honour — If you say that someone is the guest of honour at a dinner or other social occasion, you mean that they are the most important guest.
  • gulf of corinth — an inlet of the Ionian Sea between the Peloponnese and central Greece
  • gulf of taranto — an inlet of the Ionian Sea, in Apulia in SE Italy
  • gunnery officer — an officer in charge of heavy guns
  • guru meditation — (operating system)   The Amiga equivalent of Unix's panic (sometimes just called a "guru" or "guru event"). When the system crashes, a cryptic message of the form "GURU MEDITATION #XXXXXXXX.YYYYYYYY" may appear, indicating what the problem was. An Amiga guru can figure things out from the numbers. In the earliest days of the Amiga, there was a device called a "Joyboard" which was basically a plastic board built onto a joystick-like device; it was sold with a skiing game cartridge for the Atari game machine. It is said that whenever the prototype OS crashed, the system programmer responsible would concentrate on a solution while sitting cross-legged, balanced on a Joyboard, resembling a meditating guru. Sadly, the joke was removed in AmigaOS 2.04. The Jargon File claimed that a guru event had to be followed by a Vulcan nerve pinch but, according to a correspondent, a mouse click was enough to start a reboot.
  • gynandromorphic — (of an organism) Having male and female characteristics.
  • hacking x for y — [ITS] Ritual phrasing of part of the information which ITS made publicly available about each user. This information (the INQUIR record) was a sort of form in which the user could fill out various fields. On display, two of these fields were always combined into a project description of the form "Hacking X for Y" (e.g. ""Hacking perceptrons for Minsky""). This form of description became traditional and has since been carried over to other systems with more general facilities for self-advertisement (such as Unix plan files).
  • haemoglobinuria — the presence of haemoglobin in the urine
  • haemoglobinuric — relating to the presence of haemoglobin in the urine
  • halting problem — The problem of determining in advance whether a particular program or algorithm will terminate or run forever. The halting problem is the canonical example of a provably unsolvable problem. Obviously any attempt to answer the question by actually executing the algorithm or simulating each step of its execution will only give an answer if the algorithm under consideration does terminate, otherwise the algorithm attempting to answer the question will itself run forever. Some special cases of the halting problem are partially solvable given sufficient resources. For example, if it is possible to record the complete state of the execution of the algorithm at each step and the current state is ever identical to some previous state then the algorithm is in a loop. This might require an arbitrary amount of storage however. Alternatively, if there are at most N possible different states then the algorithm can run for at most N steps without looping. A program analysis called termination analysis attempts to answer this question for limited kinds of input algorithm.
  • hard of hearing — partially deaf
  • hardhead sponge — any of several commercial sponges, as Spongia officinalis dura, of the West Indies and Central America, having a harsh, fibrous, resilient skeleton.
  • hearing ear dog — a dog that has been trained to alert a hearing-impaired person to sounds, as a telephone ringing or dangerous noises.
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