21-letter words containing n, o, r
- aniline hydrochloride — a white, crystalline, water-soluble solid, C 6 H 5 NH 2 ⋅HCl, used chiefly as an intermediate in the manufacture of dyes, especially aniline black.
- antarctic archipelago — a group of islands in the South Atlantic Ocean, off the NW coast of the Antarctic Peninsula.
- antarctic convergence — the fairly well-defined boundary that exists between the cold antarctic waters and the warmer waters to the north and can be traced around the world.
- antiferromagnetically — In an antiferromagnetic manner.
- antihemophilic factor — a protein that is essential to normal blood clotting and is lacking or deficient in persons having hemophilia A. Abbreviation: AHF.
- appellation controlee — a designation on the label of certain French wines, brandies, etc. guaranteeing that the contents meet established standards, as type of grape and location of vineyard
- appendicular skeleton — the girdles and skeleton of the limbs
- application developer — (job) Someone who does application development.
- applications software — application program
- appropriation account — an account showing how funds have been used
- argumentum ad hominem — fallacious argument that attacks not an opponent's beliefs but his motives or character
- arithmetic logic unit — the part of a central processing unit that performs arithmetic and logical operations
- arithmetic/logic unit — ALU.
- articles of agreement — a contract between the captain of a ship and a crew member regarding stipulations of a voyage, signed prior to and upon termination of a voyage.
- as good as one's word — doing what one has undertaken or promised to do
- 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.
- astronomical twilight — the period of time during which the sun is 18° below the horizon
- 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.
- 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)
- banach-tarski paradox — (mathematics) It is possible to cut a solid ball into finitely many pieces (actually about half a dozen), and then put the pieces together again to get two solid balls, each the same size as the original. This paradox is a consequence of the Axiom of Choice.
- barbiturate poisoning — poisoning caused by overdose of a barbiturate
- 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
- basis of articulation — a configuration of the speech tract that represents the most neutral articulatory configuration for a given language.
- 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.
- be (one) too many for — to defeat; overwhelm
- be in apple-pie order — If a room or a desk is in apple pie order, it is neat and tidy, and everything is where it should be.
- be on the danger list — to be critically ill in hospital
- be run off one's feet — to be very busy
- beat one's brains out — Anatomy, Zoology. the part of the central nervous system enclosed in the cranium of humans and other vertebrates, consisting of a soft, convoluted mass of gray and white matter and serving to control and coordinate the mental and physical actions.
- been there, done that — in or at that place (opposed to here): She is there now.
- before-and-after test — a test which compares the state or function of something before intervention or modification, and after it
- 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.
- bernadette of lourdes — Saint. original name Marie Bernarde Soubirous. 1844–79, French peasant girl born in Lourdes, whose visions of the Virgin Mary led to the establishment of Lourdes as a centre of pilgrimage, esp for the sick or crippled. Feast day: Feb 18
- 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
- bibliographic control — the identification, description, analysis, and classification of books and other materials of communication so that they may be effectively organized, stored, retrieved, and used when needed.