20-letter words containing a, d, r, i, t, c
- a drop in the bucket — an amount very small in relation to what is needed or desired
- acadia national park — a national park in Maine, on Mount Desert Island. 44 sq. mi. (114 sq. km).
- accommodation bureau — a business that finds accommodation for its clients
- accommodation collar — the arrest of a person on little or no evidence merely to fill a public or political demand for police action.
- accommodation ladder — a flight of stairs or a ladder for lowering over the side of a ship for access to and from a small boat, pier, etc
- accounting standards — a set of standard rules that accountancy companies are obliged to follow
- adirondack mountains — a mountain range in NE New York State. Highest peak: Mount Marcy, 1629 m (5344 ft)
- administrative court — a court that specializes in dealing with cases relating to the way in which government bodies exercise their powers
- adrenocorticosteroid — corticosteroid
- adrenocorticotrophic — stimulating the adrenal cortex
- adrenocorticotrophin — (hormone) adrenocorticotropic hormone.
- advertising campaign — An advertising campaign is a planned series of advertisements.
- aids-related complex — a condition that may develop into AIDS, characterized by the enlargement of the lymph nodes
- air-raid precautions — measures taken to protect the public from air-raid attacks
- alternative comedian — someone who practises alternative comedy
- alternative medicine — treatments: homeopathic
- amateur packet radio — (communications) (PR) The use of packet radio by amateurs to communicate between computers. PR is a complete amateur radio computer network with "digipeaters" (relays), mailboxes (BBS) and other special nodes. In Germany, it is on HF, say, 2m (300 and 1200 BPS), 70cm (1200 to 9600 BPS), 23cm (normally 9600 BPS and up, currently most links between digipeaters) and higher frequencies. There is a KW (short wave) Packet Radio at 300 BPS, too. Satellites with OSCAR (Orbiting Sattelite Carring Amateur Radio) transponders (mostly attached to commercial satellites by the AMateur SATellite (AMSAT) group) carry Packet Radio mailboxes or digipeaters. There are both on-line and off-line services on the packet radio network: You can send electronic mail, read bulletins, chat, transfer files, connect to on-line DX-Clusters (DX=far distance) to catch notes typed in by other HAMs about the hottest international KW connections currently coming up (so you can pile up). PR uses AX.25 (an X.25 derivative) as its transport layer and sometimes even TCP/IP is transmitted over AX.25. AX.25 is like X.25 but the adressing uses HAM "calls" like "DG8MGV". There are special "wormholes" all over the world which "tunnel" amateur radio traffic through the Internet to forward mail. Sometimes mails travels over satelites. Normally amateur satellites have strange orbits, however the mail forwarding or mailbox satellites have very predictable orbits. Some wormholes allow HAMs to bridge from Internet to AMPR-NET, e.g. db0fho.ampr.org or db0fho.et-inf.fho-emden.de, but only if you are registered HAM. Because amateur radio is not for profit, it must not be interconnected to the Internet but it may be connected through the Internet. All people on the (completely free) amateur radio net must be licensed radio amateurs and must have a "call" which is unique all over the world. There is a special domain AMPR.ORG (44.*.*.*) for amateur radio reserved in the IP space. This domain is split between countries, which can further subdivide it. For example 44.130.*.* is Germany, 44.130.58.* is Augsburg (in Bavaria), and 44.130.58.20 is dg8mgv.ampr.org (you may verify this with nslookup). Mail transport is only one aspect of packet radio. You can talk interactively (as in chat), read files, or play silly games built in the Packet Radio software. Usually you can use the autorouter to let the digipeater network find a path to the station you want. However there are many (sometimes software incompatible) digipeaters out there, which the router cannot use. Paths over 1000 km are unlikely to be useable for real-time communication and long paths can introduce significant delay times (answer latency). Other uses of amateur radio for computer communication include RTTY (baudot), AMTOR, PACTOR, and CLOVER.
- angular displacement — the angle through which a point, line, or body is rotated about a specific axis in a given direction
- antidiuretic hormone — vasopressin. Abbreviation: ADH.
- antimony oxychloride — a white, water-insoluble powder, SbOCl, used chiefly in the manufacture of antimony salts.
- asexual reproduction — reproduction, as budding, fission, or spore formation, not involving the union of gametes.
- background radiation — low-intensity radiation from, for example, small amounts of radioisotopes in soil, air, building materials, etc
- backwards compatible — backward compatibility
- ballet-wrap cardigan — a cardigan with wrapover fronts which are fastened with wraparound ties
- basic lead carbonate — ceruse.
- basic object adapter — (architecture) (BOA) Part of the CORBA architecture.
- biological diversity — Biological diversity is the same as biodiversity.
- black-throated diver — a diving bird, Gavia arctica, found in Europe and Asia, and a rare summer visitor to the UK
- blending inheritance — the blending of characteristics of the parents in the offspring, as in a pink flower that results from the mating of a red flower with a white one
- bolometric magnitude — the magnitude of a star derived either from the total energy that it radiates at all wavelengths or from the total energy of those of its wavelengths that are received on earth.
- breadth-first search — (algorithm) A graph search algorithm which tries all one-step extensions of current paths before trying larger extensions. This requires all current paths to be kept in memory simultaneously, or at least their end points. Opposite of depth-first search. See also best first search.
- broadcast journalism — journalism as practiced in radio and television.
- broadcasting station — a television or radio station
- carbohydrate loading — the practice of eating high amounts of carbohydrates, sometimes after a period of low carbohydrate intake, for several days immediately before competing in an athletic event, especially a marathon, in order to store glycogen in the body, thereby providing greater reserves of energy.
- carbon tetrachloride — a colourless volatile nonflammable sparingly soluble liquid made from chlorine and carbon disulphide; tetrachloromethane. It is used as a solvent, cleaning fluid, and insecticide. Formula: CCl4
- care and maintenance — the state of a building, ship, machinery, etc, that is not in current use although it is kept in good condition to enable it to be quickly brought into service if there is demand for it
- cartesian coordinate — Usually, Cartesian coordinates. a member of a system of coordinates for locating a point on a plane (Cartesian plane) by its distance from each of two intersecting lines, or in space by its distance from each of three planes intersecting at a point.
- catherine de medicis — (Caterina de' Medici) 1518–89, queen of Henry II of France (mother of Francis II, Charles IX, and Henry III).
- catherine de' medici — 1519–89, queen of Henry II of France; mother of Francis II, Charles IX, and Henry III of France; regent of France (1560–74). She was largely responsible for the massacre of Protestants on Saint Bartholomew's Day (1572)
- cavendish experiment — the experiment, conducted by Henry Cavendish, that determined the constant of gravitation by using a torsion balance and measuring the torsion produced by two masses placed at given distances from the masses on the balance.
- central bedfordshire — a unitary authority of S central England. Pop: 252 100 (2007 est). Area: 712 sq km (275 sq miles)
- central india agency — a former group of 89 states in India, under the supervision of a British political agent until 1947: most important were Indore, Bhopal, and Rewa
- certified accountant — (in Britain) a member of the Chartered Association of Certified Accountants, who is authorized to audit company accounts
- chapter of accidents — a series of misfortunes
- child support agency — the British government agency concerned with the welfare of children
- child-abuse register — (in Britain) a list of children deemed to be at risk of abuse or injury from their parents or guardians, compiled and held by a local authority, area health authority, or NSPCC Special Unit
- childhood sweetheart — a boyfriend or girlfriend from an early stage of life
- chromatic adaptation — the alteration by photosynthesizing organisms of the proportions of their photosynthetic pigments in response to the intensity and colour of the available light, as shown by algae in the littoral zone, which change from green to red as the zone is descended
- chromaticity diagram — a diagram in which values of two chromaticity coordinates are marked on a pair of rectangular axes, a point in the plane of these axes representing the chromaticity of any colour
- cleansing department — the department of a local authority that collects refuse
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