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21-letter words containing c, o, r, e

  • assisted reproduction — the use of medical techniques to bring about the conception and birth of a child, including artificial insemination, in vitro fertilization, egg and embryo donation, and drug therapy.
  • astronomical distance — the distance from one celestial body to another, measured in astronomical units, light-years, or parsecs.
  • astronomical latitude — the angle between the direction of gravity at the observer's position and the plane of the celestial equator
  • astronomical triangle — the spherical triangle formed by the great circles connecting a celestial object, the zenith, and the celestial pole.
  • atmospheric inversion — inversion (def 12).
  • atmospheric-inversion — an act or instance of inverting.
  • atomic disintegration — a process resulting in the change of a radioactive nucleus, either by emission of an alpha, beta, or gamma ray or by fission, and producing a change in the original mass, atomic number, or energy
  • atrioventricular node — a small mass of muscular fibers at the base of the wall between the atria, conducting impulses received from the sinoatrial node by way of the atrioventricular bundles and, under certain conditions, functioning for the sinoatrial node as pacemaker of the heart. Abbreviation: A-V node.
  • australian cattle dog — a compact strongly-built dog of a breed with pricked ears and a smooth bluish-grey coat, often used for controlling and moving cattle
  • aversive conditioning — a type of behavior conditioning in which noxious stimuli are associated with undesirable or unwanted behavior that is to be modified or abolished, as the use of nausea-inducing drugs in the treatment of alcoholism.
  • axial-flow compressor — a device for compressing a gas by accelerating it tangentially by means of bladed rotors, to increase its kinetic energy, and then diffusing it through static vanes (stators), to increase its pressure
  • background processing — the ability of a system to perform a low-priority task while, at the same time, dealing with a main application
  • background projection — the projection from the rear of previously photographed material on a translucent screen, used as background for a television or motion-picture shot.
  • bad conduct discharge — a discharge of a person from military service for an offense less serious than one for which a dishonorable discharge is given.
  • baja california norte — a state of NW Mexico, in the N part of the Lower California peninsula. Capital: Mexicali. Pop: 2 487 700 (2000). Area: about 71 500 sq km (27 600 sq miles)
  • barren ground caribou — a migrating caribou of the North American tundra and taiga, having many-branched slender antlers.
  • barrier contraceptive — any form of contraceptive that prevents impregnation by physically preventing the sperm from reaching the egg
  • baudouin de courtenay — Jan Ignacy Niecisław [yahn ig-nah-tsi nye-tsis-lahf] /yɑn ɪgˈnɑ tsɪ ˈnyɛ tsɪsˌlɑf/ (Show IPA), 1845–1929, Polish linguist: pioneer in modern phonology.
  • behavior modification — a technique that seeks to modify animal and human behavior through application of the principles of conditioning, in which rewards and reinforcements, or punishments, are used to establish desired habits, or patterns of behavior
  • behavioural contagion — the spread of a particular type of behaviour, such as crying, through a crowd or group of people
  • benzalkonium chloride — a white or yellowish-white, water-soluble mixture of ammonium chloride derivatives having the structure C 8 H 10 NRCl, where R is a mixture of radicals ranging from C 8 H 17 – to C 18 H 37 –, that occurs as an amorphous powder or in gelatinous lumps: used chiefly as an antiseptic and a disinfectant.
  • benzethonium chloride — a colorless, water-soluble, crystalline solid, ammonium chloride derivative, (C 27 H 42 O 2 N)Cl⋅H 2 O, used chiefly as an antiseptic.
  • bernoulli's principle — the principle that in a liquid flowing through a pipe the pressure difference that accelerates the flow when the bore changes is equal to the product of half the density times the change of the square of the speed, provided friction is negligible
  • bichloride of mercury — mercuric chloride
  • binomial nomenclature — a system for naming plants and animals by means of two Latin names: the first indicating the genus and the second the species to which the organism belongs, as in Panthera leo (the lion)
  • biobehavioral science — any of the various branches of the life sciences, as neurobiology, neurochemistry, or neuroendocrinology, that deal with biological aspects of behavior.
  • bird-voiced tree frog — a frog, Hyla avivoca, of the southern U.S., having a birdlike, whistling call.
  • black-headed fireworm — the larva of any of several moths, as Rhopobota naevana (black-headed fireworm) which feeds on the leaves of cranberries and causes them to wither.
  • boiling-water reactor — a nuclear reactor using water as coolant and moderator, steam being produced in the reactor itself: enriched uranium oxide cased in zirconium is the fuel
  • bonnie prince charlie — a member of the royal family that ruled in Scotland from 1371 to 1714 and in England from 1603 to 1714.
  • book of common prayer — the official book of church services of the Church of England, until 1980, when the Alternative Service Book was sanctioned
  • bottlebrush moustache — a short, bristly moustache
  • box-office attraction — something or something that persuades people to buy tickets for a film or play
  • breath-of-life packet — (XEROX PARC) An Ethernet packet that contains bootstrap code, periodically sent out from a working computer to infuse the "breath of life" into any computer on the network that has crashed. Computers depending on such packets have sufficient hardware or firmware code to wait for (or request) such a packet during the reboot process. See also dickless workstation. The notional "kiss-of-death packet", with a function complementary to that of a breath-of-life packet, is recommended for dealing with hosts that consume too many network resources. Though "kiss-of-death packet" is usually used in jest, there is at least one documented instance of an Internet subnet with limited address-table slots in a gateway computer in which such packets were routinely used to compete for slots, rather like Christmas shoppers competing for scarce parking spaces.
  • british north america — (formerly) Canada or its constituent regions or provinces that formed part of the British Empire
  • bryan-chamorro treaty — a treaty (1914) between the U.S. and Nicaragua by which the U.S. secured exclusive rights to build a canal across Nicaragua, to connect the Atlantic and Pacific.
  • buffalo carpet beetle — any of several small beetles of the family Dermestidae, the larvae of which are household pests, feeding on rugs and other woolen fabrics, especially Anthrenus scrophulariae (buffalo carpet beetle) and Attagenus piceus (black carpet beetle)
  • butterfly common lisp — A parallel version of Common LISP for the BBN Butterfly computer.
  • byte-code interpreter — (software)   A program that executes a byte code program. An example is the Java Virtual Machine.
  • cantilever foundation — a building foundation supporting its load partly or wholly upon cantilevers.
  • carlos saavedra lamas — Carlos [kahr-laws] /ˈkɑr lɔs/ (Show IPA), 1878?–1959, Argentine statesman and diplomat: Nobel Peace Prize 1936.
  • caroline of brunswick — 1768–1821, wife of George IV of the United Kingdom: tried for adultery (1820)
  • cartesian coordinates — a system of representing points in space in terms of their distance from a given origin measured along a set of mutually perpendicular axes. Written (x,y,z) with reference to three axes
  • category merchandiser — A category merchandiser is a person whose job is to maintain stocks, manage displays and promote sales of a certain product category such as footwear.
  • catherine of braganza — 1638–1705, wife of Charles II of England, daughter of John IV of Portugal
  • caviar to the general — a thing appealing only to a highly cultivated taste: Hamlet II, ii
  • central european time — the standard time adopted by Western European countries one hour ahead of Greenwich Mean Time, corresponding to British Summer Time
  • central limit theorem — any of several theorems stating that the sum of a number of random variables obeying certain conditions will assume a normal distribution as the number of variables becomes large.
  • certificate authority — (cryptography, body)   (CA or "Trusted Third Party") An entity (typically a company) that issues digital certificates to other entities (organisations or individuals) to allow them to prove their identity to others. A Certificate Authority might be an external company such as VeriSign that offers digital certificate services or they might be an internal organisation such as a corporate MIS department. The Certificate Authority's chief function is to verify the identity of entities and issue digital certificates attesting to that identity. The process uses public key cryptography to create a "network of trust". If I want to prove my identity to you, I ask a CA (who you trust to have verified my identity) to encrypt a hash of my signed key with their private key. Then you can use the CA's public key to decrypt the hash and compare it with a hash you calculate yourself. Hashes are used to decrease the amount of data that needs to be transmitted. The hash function must be cryptographically strong, e.g. MD5.
  • certificate of origin — a document stating the name of the country that produced a specified shipment of goods: often required before importation of goods
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