21-letter words containing a, c, d, e, m
- accommodation address — an address on letters, etc, to a person or business that does not wish or is not able to receive post at a permanent or actual address
- accommodation officer — a person employed by an institution or organization, whose job it is to find accommodation for the people who attend that institution, esp for students at a university or college
- active matrix display — (hardware) A type of liquid crystal display where each display element (each pixel) includes an active component such as a transistor to maintain its state between scans. Contrast passive matrix display.
- adjusted gross income — (in U.S. income-tax returns) the total of an individual's wages, salaries, interest, dividends, etc., minus allowable deductions. Abbreviation: AGI.
- administrative county — a principal administrative division in Great Britain, usually not coextensive with traditional county boundaries.
- advanced photo system — a system that enables photographs in different formats to be taken on the same (small) roll of film
- advanced risc machine — (processor) (ARM, Originally Acorn RISC Machine). A series of low-cost, power-efficient 32-bit RISC microprocessors for embedded control, computing, digital signal processing, games, consumer multimedia and portable applications. It was the first commercial RISC microprocessor (or was the MIPS R2000?) and was licensed for production by Asahi Kasei Microsystems, Cirrus Logic, GEC Plessey Semiconductors, Samsung, Sharp, Texas Instruments and VLSI Technology. The ARM has a small and highly orthogonal instruction set, as do most RISC processors. Every instruction includes a four-bit code which specifies a condition (of the processor status register) which must be satisfied for the instruction to be executed. Unconditional execution is specified with a condition "true". Instructions are split into load and store which access memory and arithmetic and logic instructions which work on registers (two source and one destination). The ARM has 27 registers of which 16 are accessible in any particular processor mode. R15 combines the program counter and processor status byte, the other registers are general purpose except that R14 holds the return address after a subroutine call and R13 is conventionally used as a stack pointer. There are four processor modes: user, interrupt (with a private copy of R13 and R14), fast interrupt (private copies of R8 to R14) and supervisor (private copies of R13 and R14). The ALU includes a 32-bit barrel-shifter allowing, e.g., a single-cycle shift and add. The first ARM processor, the ARM1 was a prototype which was never released. The ARM2 was originally called the Acorn RISC Machine. It was designed by Acorn Computers Ltd. and used in the original Archimedes, their successor to the BBC Micro and BBC Master series which were based on the eight-bit 6502 microprocessor. It was clocked at 8 MHz giving an average performance of 4 - 4.7 MIPS. Development of the ARM family was then continued by a new company, Advanced RISC Machines Ltd. The ARM3 added a fully-associative on-chip cache and some support for multiprocessing. This was followed by the ARM600 chip which was an ARM6 processor core with a 4-kilobyte 64-way set-associative cache, an MMU based on the MEMC2 chip, a write buffer (8 words?) and a coprocessor interface. The ARM7 processor core uses half the power of the ARM6 and takes around half the die size. In a full processor design (ARM700 chip) it should provide 50% to 100% more performance. In July 1994 VLSI Technology, Inc. released the ARM710 processor chip. An ARM800 chip is also planned.
- aerodynamic stability — Aerodynamic stability is the way that a moving vehicle reacts to changes in air caused by passing vehicles.
- aerodynamic wave drag — the restraining force on a supersonic aircraft caused by shock waves.
- afro-american studies — black studies.
- aids dementia complex — a brain disorder in people with AIDS that causes severe irreparable memory loss and disorientation, affecting the ability to function in social or work settings. Abbreviation: ADC.
- airborne command post — any of several converted commercial aircraft equipped with special communications and code gear, intended as flying bunkers for the president, secretary of defense, military commanders, or their designated replacements.
- aladdin systems, inc. — (company) The company that developed and distributes Stuffit and other utility software for the Macintosh, Microsoft Windows, and Palm handheld computers. Not to be confused with Aladdin Enterprises.
- algorithm description — (language) (ALDES) ["The Algorithm Description Language ALDES", R.G.K. Loos, SIGSAM Bull 14(1):15-39 (Jan 1976)].
- american red squirrel — either of two reddish-brown squirrels, Tamiasciurus hudsonicus or T. douglasii, inhabiting forests of North America
- american saddle horse — one of a breed of horses, raised originally in the U.S., that have high-stepping gaits and are bred to the three-gaited or five-gaited type.
- antigenic determinant — the specific part of an antigen molecule to which an antibody becomes attached
- archimedes' principle — a law of physics stating that the apparent upward force (buoyancy) of a body immersed in a fluid is equal to the weight of the displaced fluid
- 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
- 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
- baton de commandement — an antler object found in Upper Palaeolithic sites from the Aurignacian period onwards, consisting of a rod, often ornately decorated, with a hole through the thicker end
- 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
- behind someone's back — without someone's knowledge or consent
- 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.
- 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.
- carlos saavedra lamas — Carlos [kahr-laws] /ˈkɑr lɔs/ (Show IPA), 1878?–1959, Argentine statesman and diplomat: Nobel Peace Prize 1936.
- 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.
- central daylight time — the time observed in the Central Time Zone of the United states when Daylight Savings Time is in effect; GMT -5
- central standard time — one of the standard times used in North America, based on the local time of the 90° meridian, six hours behind Greenwich Mean Time
- character development — the portrayal of people in a work of fiction in such a way that the reader or audience seems to learn more about them as they develop
- christmas decorations — decorations of different kinds appropriate to Christmas, such as tinsel, candles, images of angels, etc.
- class-relation method — (programming) A design technique based on the concepts of object-oriented programming and the Entity-Relationship model from the French company Softeam.
- clement of alexandria — Saint. original name Titus Flavius Clemens. ?150–?215 ad, Greek Christian theologian: head of the catechetical school at Alexandria; teacher of Origen. Feast day: Dec 5
- closed-angle glaucoma — angle-closure glaucoma. See under glaucoma.
- collimator viewfinder — a type of viewfinder in a camera
- column address strobe — (hardware) (CAS) A signal sent from a processor (or memory controller) to a dynamic random-access memory (DRAM) (qv) circuit to indicate that the column address lines are valid.
- comfortably-furnished — containing comfortable furniture
- committal proceedings — a preliminary hearing in a magistrates' court to decide if there is a case to answer
- common carotid artery — the part of a carotid artery between its origin and its point of division into branches.
- competitive advantage — an advantage based on success in competition
- computer aided design — (application) (CAD) The part of CAE concerning the drawing or physical layout steps of engineering design. Often found in the phrase "CAD/CAM" for ".. manufacturing".
- computer-aided design — the use of computer techniques in designing products, esp involving the use of computer graphics
- consultation document — a report that is the result of a consultation process
- conventional medicine — the type of medicine that is generally used in the US and Europe which uses drugs and surgery as a form of treatment
- cosmological redshift — the part of the redshift of celestial objects resulting from the expansion of the universe.
- counterdemonstrations — Plural form of counterdemonstration.
- croscarmellose sodium — Croscarmellose sodium is a substance used in tablets and capsules as a disintegrant.
- dark-field microscope — ultramicroscope
- dead from the neck up — stupid or unintelligent
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