15-letter words containing a, d, g, i, o
- powder magazine — a compartment for the storage of ammunition and explosives.
- prairie-dogging — (in an open-plan office) the practice of looking over the top of one's partition in order to discover the source of or reason for a commotion
- predicate logic — (logic) (Or "predicate calculus") An extension of propositional logic with separate symbols for predicates, subjects, and quantifiers. For example, where propositional logic might assign a single symbol P to the proposition "All men are mortal", predicate logic can define the predicate M(x) which asserts that the subject, x, is mortal and bind x with the universal quantifier ("For all"): All x . M(x) Higher-order predicate logic allows predicates to be the subjects of other predicates.
- prestidigitator — sleight of hand; legerdemain.
- program trading — trading on international stock exchanges using a computer program to exploit differences between stock index futures and actual share prices on world equity markets
- pseudepigraphon — any book of the Pseudepigrapha
- psychodiagnosis — a psychological examination using psychodiagnostic techniques.
- pyrogallic acid — pyrogallol
- pyrogallic-acid — a white, crystalline, water-soluble, poisonous, solid, phenolic compound, C 6 H 3 (OH) 3 , obtained by heating gallic acid and water: used chiefly as a developer in photography, as a mordant for wool, in dyeing, and in medicine in the treatment of certain skin conditions.
- radiator grille — a grille in an automobile or the like for air cooling of the liquid in the cooling system.
- radio programme — something that is broadcast on radio
- radioautography — autoradiography.
- radiogoniometer — a device used to detect the direction of radio waves, consisting of a coil that is free to rotate within two fixed coils at right angles to each other
- radiogoniometry — the science of detecting the direction of radio waves
- radioimmunology — the study of biological substances or processes with the aid of antigens or antibodies labeled with a radioactive isotope.
- radiophotograph — a photograph or other image transmitted by radio.
- radiotechnology — the technical application of any form of radiation to industry.
- radiotelegraphy — the constructing or operating of radiotelegraphs.
- ramrod straight — having a very straight figure
- random sampling — a method of selecting a sample (random sample) from a statistical population in such a way that every possible sample that could be selected has a predetermined probability of being selected.
- record-breaking — top, most successful
- recording angel — an angel who supposedly keeps a record of every person's good and bad acts
- right-hand buoy — a distinctive buoy marking the side of a channel regarded as the right, or starboard, side.
- robert guiscard — Robert [French raw-ber] /French rɔˈbɛr/ (Show IPA), (Robert de Hauteville) c1015–85, Norman conqueror in Italy.
- rogation sunday — the fifth Sunday after Easter; it sees the start of the supplications that are continued during the following Monday, Tuesday and Wednesday
- rolling meadows — a city in NE Illinois, near Chicago.
- rotary drilling — Rotary drilling is the use of a continuous circular motion of the drill bit to make a hole.
- routeing domain — (networking) (US "routing") A set of routers that exchange routeing information within an administrative domain.
- rowland heights — a city in SW California, near Los Angeles.
- scotch highland — any of a breed of small, hardy, usually dun-colored, shaggy-haired beef cattle with long, widespread horns, able to withstand the cold and sparse pasturage of its native western Scottish uplands.
- securicor guard — a guard who works for Securicor
- self-diagnostic — the diagnosis of one's own malady or illness.
- sewage disposal — waste processing
- shopping arcade — a place where a number of shops are connected together under one roof
- silver quandong — an Australian tree, Elaeocarpus grandis: family Elaeocarpaceae
- sleight of hand — skill in feats requiring quick and clever movements of the hands, especially for entertainment or deception, as jugglery, card or coin magic, etc.; legerdemain.
- smoking-related — (of a disease, illness, etc) caused by smoking tobacco, etc
- social drinking — the practice of drinking alcohol occasionally and usually only in social situations
- social spending — the money that is spent on welfare payments
- social standing — a person's status or social class in society
- social-drinking — a person who drinks alcoholic beverages usually in the company of others and is in control of his or her drinking.
- sound deadening — a process or material that reduces the resonance or volume of sound
- sound-and-light — combining sound effects or music with unusual lighting displays: to promote a product with a spectacular sound-and-light presentation.
- spawning ground — a place where fish deposit their eggs for fertilization
- stage direction — an instruction written into the script of a play, indicating stage actions, movements of performers, or production requirements.
- stamford bridge — a village in N England, east of York: site of a battle (1066) in which King Harold of England defeated his brother Tostig and King Harald Hardrada of Norway, three weeks before the Battle of Hastings
- stamping ground — a habitual or favorite haunt.
- standing orders — Military. (formerly) a general order always in force in a command and establishing uniform procedures for it; standard operating procedure.
- storage disease — a metabolic disorder characterized by excessive storage in certain cells of normal metabolic intermediates, as fats, iron, and carbohydrates.
- straightforward — going or directed straight ahead: a straightforward gaze.