20-letter words containing u, d, a, i
- a drop in the bucket — an amount very small in relation to what is needed or desired
- a load off your mind — If you say that something that happens is a load off your mind or a weight off your mind, you mean that it causes you to stop worrying, for example because it solves a problem that you had.
- absolute undertaking — a legally binding promise to do something that is not restricted or qualified in any way
- accommodation bureau — a business that finds accommodation for its clients
- accounting standards — a set of standard rules that accountancy companies are obliged to follow
- add insult to injury — to make an unfair or unacceptable situation even worse
- 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
- adult onset diabetes — diabetes (def 4).
- adult-onset diabetes — any of several disorders characterized by increased urine production.
- after-hours drinking — drinking in a pub after its legal closing time
- air-raid precautions — measures taken to protect the public from air-raid attacks
- aluminum borohydride — a volatile liquid, Al(BH 4) 3 , that ignites spontaneously in air and reacts vigorously with water to form hydrogen, used chiefly in organic synthesis.
- 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.
- amicus usque ad aras — a friend to the last degree.
- amplitude modulation — one of the principal methods of transmitting audio, visual, or other types of information using radio waves, the relevant signal being superimposed onto a radio-frequency carrier wave. The frequency of the carrier wave remains unchanged but its amplitude is varied in accordance with the amplitude of the input signal
- anglo-egyptian sudan — territory jointly administered by Egypt & Great Britain (1899-1956)
- angular displacement — the angle through which a point, line, or body is rotated about a specific axis in a given direction
- anomalous dispersion — a sudden change in the refractive index of a material for wavelengths in the vicinity of absorption bands in the spectrum of the material.
- antidandruff shampoo — a shampoo that prevents or treats dandruff
- antidiuretic hormone — vasopressin. Abbreviation: ADH.
- antigestational drug — a drug that averts a pregnancy by preventing the fertilized egg from becoming implanted in the uterine wall.
- antimony trifluoride — a white to grayish-white, crystalline, hygroscopic, water-soluble, poisonous solid, SbF 3 , used chiefly in dyeing textiles.
- apollonius of rhodes — 3rd century bc, Greek epic poet and head of the Library of Alexandria. His principal work is the four-volume Argonautica
- appalachian dulcimer — dulcimer (def 2).
- aquila degli abruzzi — a city in central Italy, capital of Abruzzi region. Pop: 68 503 (2001)
- argument from design — the argument for the existence of God based on the assumption that order in the universe implies an orderer and cannot be a natural feature of the universe.
- asexual reproduction — reproduction, as budding, fission, or spore formation, not involving the union of gametes.
- audio-lingual method — a technique of foreign-language instruction that emphasizes audio-lingual skills over reading and writing and is characterized by extensive use of pattern practice.
- background radiation — low-intensity radiation from, for example, small amounts of radioisotopes in soil, air, building materials, etc
- basic encoding rules — (protocol, standard) (BER) ASN.1 encoding rules for producing self-identifying and self-delimiting transfer syntax for data structures described in ASN.1 notations. BER is an self-identifying and self-delimiting encoding scheme, which means that each data value can be identified, extracted and decoded individually. Huw Rogers once described BER as "a triumph of bloated theory over clean implementation". He also criticises it as designed around bitstreams with arbitrary boundaries between data which can only be determined at a high level. Documents: ITU-T X.690, ISO 8825-1. See also CER, DER, PER.
- beaverhead mountains — a mountain range on the border of E Idaho and SW Montana, in the Bitterroot Range. 10,961 feet (3343 meters).
- benzenesulfonic acid — a fine, needlelike substance, C 6 H 6 SO 3 , used chiefly as a catalyst and in the synthesis of phenol, resorcinol, and other organic products.
- bernard of clairvaux — Saint. ?1090–1153, French abbot and theologian, who founded the stricter branch of the Cistercians in 1115
- bernese mountain dog — a strong sturdy dog of a breed with a bushy tail and a long silky black coat with reddish-brown and white markings, often used as a working farm dog
- bimodal distribution — a frequency distribution with two modes
- bird-footed dinosaur — theropod.
- black lung (disease) — a disease of the lungs caused by the inhalation of coal dust; anthracosis
- blue ridge mountains — a mountain range in the eastern US, extending from West Virginia into Georgia: part of the Appalachian mountains. Highest peak: Mount Mitchell, 2038 m (6684 ft)
- board of supervisors — the governing body of a county in many U.S. states, especially in the Midwest and the East, consisting of from 15 to 100 members elected from towns, townships, cities, or wards.
- 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.
- bouvier des flandres — any of a breed of large, strong dog with a rough, wiry coat and pointed, erect ears
- broadcast journalism — journalism as practiced in radio and television.
- brown lung (disease) — a chronic disease of the lungs caused by inhalation of fine textile fibers, esp. cotton; byssinosis
- california barracuda — a small, slender barracuda, Sphyraena argentea, of coastal seas from Alaska to Baja California, valued as a food fish.
- carbocyclic compound — any of a group of organic chemical compounds in which all the atoms composing the ring are carbon atoms, as benzene or cyclopropane.
- carl friedrich gauss — (person) A German mathematician (1777 - 1855), one of all time greatest. Gauss discovered the method of least squares and Gaussian elimination. Gauss was something of a child prodigy; the most commonly told story relates that when he was 10 his teacher, wanting a rest, told his class to add up all the numbers from 1 to 100. Gauss did it in seconds, having noticed that 1+...+100 = 100+...+1 = (101+...+101)/2. He did important work in almost every area of mathematics. Such eclecticism is probably impossible today, since further progress in most areas of mathematics requires much hard background study. Some idea of the range of his work can be obtained by noting the many mathematical terms with "Gauss" in their names. E.g. Gaussian elimination (linear algebra); Gaussian primes (number theory); Gaussian distribution (statistics); Gauss [unit] (electromagnetism); Gaussian curvature (differential geometry); Gaussian quadrature (numerical analysis); Gauss-Bonnet formula (differential geometry); Gauss's identity (hypergeometric functions); Gauss sums (number theory). His favourite area of mathematics was number theory. He conjectured the Prime Number Theorem, pioneered the theory of quadratic forms, proved the quadratic reciprocity theorem, and much more. He was "the first mathematician to use complex numbers in a really confident and scientific way" (Hardy & Wright, chapter 12). He nearly went into architecture rather than mathematics; what decided him on mathematics was his proof, at age 18, of the startling theorem that a regular N-sided polygon can be constructed with ruler and compasses if and only if N is a power of 2 times a product of distinct Fermat primes.
- casing head pressure — The casing head pressure is the pressure on the casing, which is measured at the wellhead.
- certified accountant — (in Britain) a member of the Chartered Association of Certified Accountants, who is authorized to audit company accounts
- chauffeur-driven car — a car driven by a chauffeur
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