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19-letter words containing r, e, v, o

  • pre-order traversal — traversal
  • predicate objective — objective complement.
  • preferential voting — a system of voting designed to permit the voter to indicate an order of preference for the candidates on the ballot.
  • pretty good privacy — (tool, cryptography)   (PGP) A high security RSA public-key encryption application for MS-DOS, Unix, VAX/VMS, and other computers. It was written by Philip R. Zimmermann <[email protected]> of Phil's Pretty Good(tm) Software and later augmented by a cast of thousands, especially including Hal Finney, Branko Lankester, and Peter Gutmann. PGP was distributed as "guerrilla freeware". The authors don't mind if it is distributed widely, just don't ask Philip Zimmermann to send you a copy. PGP uses a public-key encryption algorithm claimed by US patent #4,405,829. The exclusive rights to this patent are held by a California company called Public Key Partners, and you may be infringing this patent if you use PGP in the USA. This is explained in the PGP User's Guide, Volume II. PGP allows people to exchange files or messages with privacy and authentication. Privacy and authentication are provided without managing the keys associated with conventional cryptographic software. No secure channels are needed to exchange keys between users, which makes PGP much easier to use. This is because PGP is based on public-key cryptography. PGP encrypts data using the International Data Encryption Algorithm with a random session key, and uses the RSA algorithm to encrypt the session key. In December 1994 Philip Zimmermann faced prosecution for "exporting" PGP out of the United States but in January 1996 the US Goverment dropped the case. A US law prohibits the export of encryption software out of the country. Zimmermann did not do this, but the US government hoped to establish the proposition that posting an encryption program on a BBS or on the Internet constitutes exporting it - in effect, stretching export control into domestic censorship. If the government had won it would have had a chilling effect on the free flow of information on the global network, as well as on everyone's privacy from government snooping.
  • primitive methodist — a member of a Protestant denomination (Primitive Methodist Church) founded in England in 1812 and later established in the U.S., characterized by its adherence to the basic doctrines, principles, and practices taught by John Wesley.
  • private prosecution — a prosecution started by a private individual rather than by the police
  • privatization issue — an issue of shares available for purchase by members of the public when a publicly owned organization is transferred to the private sector
  • professional advice — advice given by someone trained in a particular and relevant profession or job
  • progressive judaism — Reform Judaism.
  • projective geometry — the geometric study of projective properties.
  • projective property — a geometric property that is unaltered by projection; a property of relative position, as coincidence or length, but not of magnitude.
  • provably unsolvable — The set or property of problems for which no algorithm at all exists. E.g. the Halting Problem. See also provably difficult.
  • pseudo-conservative — disposed to preserve existing conditions, institutions, etc., or to restore traditional ones, and to limit change.
  • pseudo-intransitive — denoting an occurrence of a normally transitive verb in which a direct object is not explicitly stated or forms the subject of the sentence, as in Margaret is cooking or these apples cook well
  • pyorrhea alveolaris — a chronic periodontitis of the gums and tooth sockets, characterized by the formation of pus and, usually, by loosening of the teeth
  • pyorrhea-alveolaris — Pathology. a discharge of pus.
  • 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.
  • radius of curvature — the absolute value of the reciprocal of the curvature at a point on a curve.
  • rake over the coals — a black or dark-brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Compare anthracite, bituminous coal, lignite.
  • rancho palos verdes — a town in SW California.
  • reactive depression — depression occurring in response to some situational stress, as loss of one's job.
  • reciprocal leveling — leveling between two widely separated points in which observations are made in both directions to eliminate the effects of atmospheric refraction and the curvature of the earth.
  • relative complement — the set of elements contained in a given set that are not elements of another specified set.
  • 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 vietnam — the name (from 1955–75) for South Vietnam, as an independent republic, following the division of the country in 1954 into North Vietnam and South Vietnam
  • reserved occupation — in time of war, an occupation from which one will not be called up for military service
  • resistance movement — a movement fighting (for freedom, etc), often secretly or illegally, against an invader in an occupied country or against the country's government, etc
  • restorative justice — a theory and method in criminal justice in which it is arranged that the victim and the community receive restitution from the offender.
  • reversible reaction — a reaction that, depending on ambient conditions, can proceed in either of two directions: the production of the reaction products from the reactants, or the production of the original reactants from the formed reaction products. Compare equilibrium (def 4).
  • revival of learning — the Renaissance in its relation to learning, especially in literature (Revival of Literature or Revival of Letters)
  • ride roughshod over — shod with horseshoes having projecting nails or points.
  • roosevelt corollary — a corollary (1904) to the Monroe Doctrine, asserting that the U.S. might intervene in the affairs of an American republic threatened with seizure or intervention by a European country.
  • sacrifice operative — a euphemistic term for a suicide bomber
  • salvage archaeology — the collection of archaeological data and materials from a site in danger of imminent destruction, as from new construction or flooding.
  • san fernando valley — valley in SW Calif., partly in NW Los Angeles: c. 260 sq mi (673 sq km)
  • saturation coverage — news coverage (of an event, etc) that is very thorough in order not to miss any details
  • sell down the river — a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels.
  • semipalmated plover — a New World plover, Charadrius semipalmatus, having a black ring around the chest and semipalmate feet, inhabiting beaches and salt marshes.
  • sensitometric curve — characteristic curve.
  • sensory deprivation — the experimental or natural reduction of environmental stimuli, as by physical isolation or loss of eyesight, often leading to cognitive, perceptual, or behavioral changes, as disorientation, delusions, or panic.
  • separation negative — Photography. a black-and-white negative of one of the additive primary colors used to form a color image.
  • seven hills of rome — the hills on which the ancient city of Rome was built: the Palatine, Capitoline, Quirinal, Caelian, Aventine, Esquiline, and Viminal
  • shovelnose sturgeon — a small sturgeon, Scaphirhynchus platorhynchus, of the Mississippi River, having a broad, flat snout.
  • simple closed curve — a curve that is closed and that has no loops or points missing; a curve for which there exists a homeomorphism mapping it to a circle.
  • solid of revolution — a three-dimensional figure formed by revolving a plane area about a given axis.
  • soviet central asia — the region of the former Soviet Union now occupied by Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan
  • stanford university — (education)   A University in the city of Palo Alto, California, noted for work in computing, especially artificial intelligence. See SAIL.
  • stochastic variable — a random variable.
  • subtractive process — a process of color photography in which the colors are formed by combination of cyan, yellow, and magenta lights.
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