20-letter words containing ra
- absolute temperature — temperature measured from absolute zero on the Kelvin scale or on the Rankine scale
- abstract of accounts — a published condensed summary of a company or organization's annual accounts
- abstract syntax tree — (compiler) (AST) A data structure representing something which has been parsed, often used as a compiler or interpreter's internal representation of a program while it is being optimised and from which code generation is performed. The range of all possible such structures is described by the abstract syntax.
- acetylcholinesterase — an enzyme in nerve cells that is responsible for the destruction of acetylcholine and thus for switching off excitation of the nerve
- administration order — an order by a court appointing a person to manage a company that is in financial difficulty, in an attempt to ensure the survival of the company or achieve the best realization of its assets
- administrative court — a court that specializes in dealing with cases relating to the way in which government bodies exercise their powers
- administrative leave — leave, as from a government agency or department, arranged by special permission or directive: During the investigation she was placed on administrative leave with pay.
- admiral of the fleet — an officer of the highest rank in the Royal Navy, equivalent to field marshal
- agricultural college — a college of further education where students learn farming skills
- agricultural run-off — the portion of rainfall that runs over agricultural land and then into streams as surface water rather than being absorbed into ground water or evaporating
- air-raid precautions — measures taken to protect the public from air-raid attacks
- alexandra feodorovna — 1872–1918, empress of Russia (wife of Nicholas II).
- algebraic expression — a symbol or a combination of symbols used in algebra, containing one or more numbers, variables, and arithmetic operations: how to solve algebraic expressions.
- 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.
- angoumois grain moth — a gelechiid moth, Sitotroga cerealella, the larvae of which feed on stored corn and other grains.
- angular acceleration — the rate of change of angular velocity
- animal liberationist — a person who campaigns for animal rights, often by using direct action
- anthemius of tralles — c474–c534, Greek mathematician and architect, active in Lydia.
- anti-supernaturalism — supernatural character or agency.
- antony and cleopatra — a tragedy (1606–07?) by Shakespeare.
- apparent temperature — heat index.
- applications program — a program that is written and designed for specific needs or purposes
- arbitration tribunal — a tribunal set up to settle a dispute by arbitration
- architectural bronze — a brass alloy of about 57 percent copper, 41 percent zinc, and 2 percent lead.
- as straight as a die — perfectly honest
- asset turnover ratio — An asset turnover ratio is a measure of the efficiency of a company, that is calculated by dividing sales for a period by average total assets.
- at the crack of dawn — If you say that someone does something at the crack of dawn, you are emphasizing that they do it very early in the morning.
- australian rye grass — a European grass, Lolium multiflorum, naturalized in North America, having flowering spikes and used as a winter turf.
- automobile insurance — Automobile insurance is insurance coverage for cars.
- background radiation — low-intensity radiation from, for example, small amounts of radioisotopes in soil, air, building materials, etc
- baggage storage room — A baggage storage room is a room in a hotel where people can leave their baggage in order to collect it later.
- ballet-wrap cardigan — a cardigan with wrapover fronts which are fastened with wraparound ties
- ballistic trajectory — the path of an unpowered object, as a missile, moving only under the influence of gravity and possibly atmospheric friction and with its surface providing no significant lift to alter the course of flight.
- barothermohygrograph — an automatic instrument for recording pressure, temperature, and humidity.
- barrack-room ballads — a volume of poems (1892) by Rudyard Kipling, including Gunga Din, Danny Deever, and Mandalay.
- barred spiral galaxy — a spiral galaxy whose center has the form of an extended bar.
- bartramian sandpiper — upland sandpiper.
- basal metabolic rate — the rate at which heat is produced by the body at rest, 12 to 14 hours after eating, measured in kilocalories per square metre of body surface per hour
- basic rate interface — (communications) (BRI, 2B+D, 2B1D) An Integrated Services Digital Network channel consisting of two 64 kbps "bearer" (B) channels and one 16 kbps "delta" (D) channel, giving a total data rate of 144 kbps. The B channels are used for voice or user data, and the D channel is used for control and signalling and/or X.25 packet networking. BRI is the kind of ISDN interface most likely to be found in residential service.
- bats-wing coral-tree — a small tree, Erythrina verspertilio, of tropical and subtropical Australia with red flowers and leaves shaped like the wings of a bat
- be someone's funeral — to be someone's problem, worry, etc. and not another's
- bobbin and fly frame — a roving machine used in the final stages of converting spun cotton fiber into yarn.
- bone mineral density — a measurement of the amount of calcium and other minerals in a segment of bone, a higher mineral content indicating a higher bone density and strength, used to detect osteoporosis or monitor its treatment.
- brachiocephalic vein — either of two major veins, formed by the merger of the subclavian and internal jugular veins, that drain blood from the head and arms.
- brain fingerprinting — a technique in which sensors worn on the head are used to measure the involuntary brain activity of someone in response to certain images or pieces of evidence pertaining to a crime
- branch target buffer — (processor) (BTB) A register used to store the predicted destination of a branch in a processor using branch prediction?
- brazilian bikini wax — the act or instance of removing all or almost all of a woman's pubic hair for cosmetic reasons
- caesar and cleopatra — a comedy (1898) by G. B. Shaw.
- california barracuda — a small, slender barracuda, Sphyraena argentea, of coastal seas from Alaska to Baja California, valued as a food fish.
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