15-letter words containing a, y, n
- quantum gravity — a theory of the gravitational interaction that involves quantum mechanics to explain the force
- quarter century — a period of twenty five years
- quatercentenary — a 400th aniversary or its celebration.
- queen's highway — king's highway.
- query expansion — (information science) Adding search terms to a user's search. Query expansion is the process of a search engine adding search terms to a user's weighted search. The intent is to improve precision and/or recall. The additional terms may be taken from a thesaurus. For example a search for "car" may be expanded to: car cars auto autos automobile automobiles. The additional terms may also be taken from documents that the user has specified as being relevant; this is the basis for the "more like this" feature of some search engines. The extra terms can have positive or negative weights.
- questionability — of doubtful propriety, honesty, morality, respectability, etc.: questionable activities; in questionable taste.
- quezon y molina — Manuel Luis [mah-nwel lwees] /mɑˈnwɛl lwis/ (Show IPA), 1878–1944, Philippine political leader; 1st president of the Philippine Commonwealth 1933–44.
- quick-and-dirty — Informal. slipshod.
- racial minority — a group of a certain race that are in the minority compared to a larger group, the rest of the population, etc
- radar astronomy — the branch of astronomy that uses radar to map the surfaces of planetary bodies, as the moon and Venus, and to determine periods of rotation.
- radio astronomy — the branch of astronomy that utilizes extraterrestrial radiation in radio wavelengths rather than visible light for the study of the universe.
- radio frequency — the frequency of the transmitting waves of a given radio message or broadcast.
- radio sono-buoy — a buoy equipped to detect underwater noises and transmit them by radio
- 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.
- radiotechnology — the technical application of any form of radiation to industry.
- railway journey — a journey made by railway train
- railway network — a system of intersecting rail routes
- railway station — train stop, railroad station
- ranfurly shield — (in New Zealand) the premier rugby trophy, competed for annually by provincial teams
- range paralysis — Marek's disease.
- ray of sunshine — beam of sunlight
- ray-finned fish — any of various bony fishes of the subclass Actinopterygii, having strong slender rays, excluding the coelacanth and lungfish.
- ready-furnished — (of a room, house, office, etc) fitted with furniture before being rented or sold
- reality fiction — a satirical parody of a reality TV show
- reality testing — the objective evaluation of situations, defective in certain psychoses, that enable one to distinguish between the external and the internal worlds and between the self and the nonself.
- recognizability — to identify as something or someone previously seen, known, etc.: He had changed so much that one could scarcely recognize him.
- reconcilability — capable of being reconciled.
- recycling plant — a factory for processing used or abandoned materials
- refinery revamp — A refinery revamp is a change in the technology or processes used in a refinery.
- regulatory gene — any gene that exercises control over the expression of another gene or genes.
- remembrance day — (in Canada) November 11, observed as a legal holiday in memory of those who died in World Wars I and II, similar to Veterans Day in the U.S.
- remonstratingly — in an remonstrating or dissenting manner
- remonstratively — in a remonstrative or expostulatory manner
- resurrectionary — pertaining to or of the nature of resurrection.
- revolutionarily — of, pertaining to, characterized by, or of the nature of a revolution, or a sudden, complete, or marked change: a revolutionary junta.
- rhyme or reason — If something happens or is done without rhyme or reason, there seems to be no logical reason for it to happen or be done.
- right-hand buoy — a distinctive buoy marking the side of a channel regarded as the right, or starboard, side.
- ringtail monkey — a Central and South American monkey, Cebus capucinus, having a prehensile tail and hair on the head resembling a cowl.
- rocky mountains — mountain range in USA and Canada
- roentgenography — roentgenogram.
- rogation sunday — the fifth Sunday after Easter; it sees the start of the supplications that are continued during the following Monday, Tuesday and Wednesday
- roll in the hay — a document of paper, parchment, or the like, that is or may be rolled up, as for storing; scroll.
- romantic comedy — a light and humorous movie, play, etc., whose central plot is a happy love story.
- rotary drilling — Rotary drilling is the use of a continuous circular motion of the drill bit to make a hole.
- rough and ready — rough, rude, or crude, but good enough for the purpose: a rough-and-ready estimate of future expenses.
- rough-and-ready — rough, rude, or crude, but good enough for the purpose: a rough-and-ready estimate of future expenses.
- roundaboutility — roundaboutness
- royal enclosure — at the Royal Ascot horse-race meeting, an area of Ascot racecourse which is reserved for the Royal Family, members, and their guests
- royal engineers — a branch of the British army that undertakes the building of fortifications, mines, bridges, and other engineering works