15-letter words containing p, i, n, g, r, a
- de bruijn graph — (mathematics) A class of graphs with elegant properties. De Bruijn graphs are especially easy to use for routing, with shifting of source and destination addresses.
- depersonalizing — Present participle of depersonalize.
- dna fingerprint — the use of a DNA probe for the identification of an individual, as for the matching of genes from a forensic sample with those of a criminal suspect.
- draughtproofing — Present participle of draughtproof.
- draughtsmanship — (British) alternative spelling of draftsmanship.
- drip irrigation — a system of crop irrigation involving the controlled delivery of water directly to individual plants through a network of tubes or pipes.
- dynamic pricing — the practice of offering goods at a price that changes according to the level of demand, the type of customer, the state of the weather, etc
- egyptian clover — a Mediterranean clover, Trifolium alexandrinum, grown as a forage crop and to improve the soil in the southwestern US and the Nile valley
- egyptian jasper — a type of jasper, generally with zones of colour, found in desert regions of Egypt
- english sparrow — a small Eurasian weaverbird, Passer domesticus, now established in North America and Australia. It has a brown streaked plumage with grey underparts
- english speaker — a person who speaks English as a first, or second mother tongue
- engraving plate — a metal, usually steel, plate on which an image is engraved in order to be reproduced
- epeirogenically — in the manner of epeirogeny
- evening prayers — the daily evening service of Bible readings and prayers prescribed in the Book of Common Prayer
- export earnings — the earnings of a company or country that are generated through the export of goods or services
- family grouping — a system, used usually in the infant school, of grouping children of various ages together, esp for project work
- finger alphabet — a series of shapes made by the fingers that indicate letters of an alphabet and can be used in fingerspelling for the deaf
- finger painting — a jellylike paint, used chiefly by children in painting, usually with their fingers.
- flapping router — (networking) A router that transmits routing updates alternately advertising a destination network first via one route, then via a different route. Flapping routers are identified on more advanced protocol analysers such as the Network General (TM) Sniffer.
- flowering maple — any of various shrubs belonging to the genus Abutilon, of the mallow family, having large, bright-colored flowers.
- flowering plant — a plant that produces flowers, fruit, and seeds; angiosperm.
- fragrance strip — a folded, usually sealed strip on a page or card, impregnated with fragrance that is released when pulled or torn open: The magazine is full of fragrance strips in the advertisements.
- french-speaking — able to speak French
- gaming platform — a computer system specially made for playing video games; a console: The new gaming platforms have much better graphics resolution than previous generation consoles.
- garrison troops — troops who maintain and guard a military base or fortified place
- general paresis — a syphilitic brain disorder characterized by chronic inflammation and degeneration of cerebral tissue resulting in mental and physical deterioration.
- german-speaking — able to speak German
- glazier's point — a small, pointed piece of sheet metal, for holding a pane of glass in a sash until the putty has hardened.
- golden samphire — a Eurasian coastal plant, Inula crithmoides, with fleshy leaves and yellow flower heads: family Asteraceae (composites)
- grabber pointer — (operating system) A mouse pointer sprite in the shape of a small hand that closes when a mouse button is clicked, indicating that the object on the screen under the pointer has been selected.
- gramophonically — in a gramophonic manner
- grampian region — a former local government region in NE Scotland, formed in 1975 from Aberdeenshire, Kincardineshire, and most of Banffshire and Morayshire; replaced in 1996 by the council areas of Aberdeenshire, City of Aberdeen, and Moray
- 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.
- graphic granite — a pegmatite that has crystals of gray quartz imbedded in white or pink microcline in such a manner that they resemble cuneiform writing.
- grappier cement — a by-product of the calcination of hydraulic lime, having similar properties and made from ground, unslaked lumps.
- graviperception — the perception of gravity by plants
- 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 sandpiper — a species of sandpiper, Tringa ochropus, with a greenish back and wings
- greenfield park — a town in S Quebec, in E Canada, near Montreal.
- 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.
- gynandromorphic — (of an organism) Having male and female characteristics.
- 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.
- holding pattern — a traffic pattern for aircraft at a specified location (holding point) where they are ordered to remain until permitted to land or proceed.
- hung parliament — a parliament that does not have a party with a working majority
- hunting leopard — the cheetah.
- huntington park — a city in SW California, near Los Angeles.
- hyperpolarizing — Present participle of hyperpolarize.
- imperial gallon — a British gallon used in liquid and dry measurement equivalent to 1.2 U.S. gallons, or 4.54 liters.
- impregnableness — The state of being impregnable; impregnability.