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19-letter words containing a, r, d

  • radiation potential — the potential in volts that must be applied to an atom or molecule to cause it to emit radiation at one of its characteristic frequencies.
  • radiational cooling — the cooling of the earth's surface and adjacent air, primarily at night, caused by a loss of heat due to surface emission of infrared radiation.
  • radioactive fallout — the settling to the ground of airborne particles ejected into the atmosphere from the earth by explosions, eruptions, forest fires, etc., especially such settling from nuclear explosions (radioactive fallout) Compare rainout.
  • radiochromatography — chromatography in which radiolabeled substances on the chromatogram are determined quantitatively or qualitatively by measuring their radioactivity.
  • radiopharmaceutical — any of a number of radioactive drugs used diagnostically or therapeutically.
  • radius of curvature — the absolute value of the reciprocal of the curvature at a point on a curve.
  • rag-tag and bobtail — the riffraff; rabble: The ragtag and bobtail of every nation poured into the frontier in search of gold.
  • ralph waldo emerson — Ralph Waldo [wawl-doh,, wol-] /ˈwɔl doʊ,, ˈwɒl-/ (Show IPA), 1803–82, U.S. essayist and poet.
  • rancho palos verdes — a town in SW California.
  • rapture of the deep — nitrogen narcosis.
  • reactive depression — depression occurring in response to some situational stress, as loss of one's job.
  • recording secretary — an officer charged with keeping the minutes of meetings and responsible for the records.
  • red-shouldered hawk — a North American hawk, Buteo lineatus, having rufous shoulders.
  • redress the balance — to make a fair adjustment; see that justice is done
  • reduction potential — (in a galvanic cell) the potential of the electrode at which reduction occurs.
  • refreshable display — braille display
  • registered disabled — on a local authority register under the Chronically Sick and Disabled Persons Act 1970
  • regular icosahedron — an icosahedron in which each of the faces is an equilateral triangle
  • reindustrialization — the revitalization of an industry or industrial society through government aid and tax incentives, modernization of factories and machinery, etc.
  • relational database — an electronic database comprising multiple files of related information, usually stored in tables of rows (records) and columns (fields), and allowing a link to be established between separate files that have a matching field, as a column of invoice numbers, so that the two files can be queried simultaneously by the user.
  • relative impediment — a fact or circumstance that disqualifies from lawful marriage persons who are closely related.
  • religious education — religion as school subject
  • removable cartridge — a hard disk enclosed in a case that can be removed from the disk drive, having more storage than floppy disks.
  • removable hard disk — (storage)   A type of magnetic disk, or possibly magneto-optical disk which is not permanently attached to the disk drive (not a fixed disk) but which can be taken out and replaced, allowing many disks to be used in the same drive. The term "removable disk" would seem to be applicable to floppy disks but is generally reserved for hard disks in suitable cartridges such as those made by Syquest, Iomega and others. Removable disk packs were common on minicomputers such as the PDP-11 in use in the 1970s except that the drives were the size of washing machines and the disk packs as big as car wheels. Removable disks became popular on microcomputers in the 1990s as a cheap way of expanding disk space, transporting large amounts of data between computers and storing backups. Large, cheap fixed hard disks and USB memory sticks have made removable disks less attractive.
  • republic of ireland — John, 1838–1918, U.S. Roman Catholic clergyman and social reformer, born in Ireland: archbishop of St. Paul, Minn., 1888–1918.
  • reserved occupation — in time of war, an occupation from which one will not be called up for military service
  • residence insurance — Residence insurance is insurance coverage against damage to a building in which you live.
  • resonance radiation — radiation emitted by an atom or molecule, having the same frequency as that of an incident particle, as a photon, and usually involving a transition to the lowest energy level of the atom or molecule.
  • resplendent quetzal — See under quetzal (def 1).
  • reticulated tracery — tracery consisting in large part of a netlike arrangement of repeated geometrical figures.
  • reticuloendothelial — pertaining to, resembling, or involving cells of the reticuloendothelial system.
  • rhodesian ridgeback — a large short-haired breed of dog characterized by a ridge of hair growing along the back in the opposite direction to the rest of the coat. It was originally a hunting dog from South Africa
  • rickettsial disease — any of several acute infectious diseases caused by ticks, mites, or body lice infected with rickettsiae. The main types include typhus, spotted fever, Q fever, trench fever, and tsutsugamushi disease
  • rio grande do norte — a state in E Brazil. 20,464 sq. mi. (53,000 sq. km). Capital: Natal.
  • romanian tenderloin — a cut of beef consisting of the diaphragm muscle.
  • royal correspondent — a journalist who reports on matters relating to royalty
  • rural free delivery — former name for rural delivery service. Abbreviation: R.F.D.
  • saber-toothed tiger — any of several extinct members of the cat family Felidae from the Oligocene to Pleistocene Epochs, having greatly elongated, saberlike upper canine teeth.
  • sabre-toothed tiger — any of various extinct Tertiary felines of the genus Smilodon and related genera, with long curved upper canine teeth
  • saccharolactic acid — mucic acid.
  • saddharma-pundarika — a Mahayana sutra, forming with its references to Amida and the Bodhisattvas the basis for the doctrine that there is something of Buddha in everyone, so that salvation is universally available: a central text of Mahayana Buddhism.
  • saddle-billed stork — a large stork, Ephippiorhynchus senegalensis, of West Africa, having a white and black body and a long, red and black bill.
  • saint patrick's day — March 17, observed by the Irish in honor of St. Patrick, the patron saint of Ireland.
  • samoa standard time — a standard time used in the zone which includes American Samoa, corresponding to the mean solar time of the 165th meridian west of Greenwich, England: it is eleven hours behind Greenwich time
  • san bernardino pass — a pass over the Lepontine Alps in SE Switzerland. Highest point: 2062 m (6766 ft)
  • san fernando valley — valley in SW Calif., partly in NW Los Angeles: c. 260 sq mi (673 sq km)
  • san juan de la cruz — San Juan de la [sahn hwahn de lah] /sɑn ʰwɑn dɛ lɑ/ (Show IPA), John of the Cross, Saint.
  • san salvador island — an island in the central Bahamas: the first land in the New World seen by Christopher Columbus (1492). Area: 156 sq km (60 sq miles)
  • sandra day o'connor — Frank (Michael Donovan) 1903–66, Irish writer.
  • sandwich generation — the generation of people still raising their children while having to care for their aging parents.
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