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22-letter words containing a, n, o, r, e

  • cylindrical coordinate — Usually, cylindrical coordinates. a member of a system of coordinates for locating a point in space by its polar coordinates and its perpendicular distance to the polar plane.
  • dalton's atomic theory — the theory that matter consists of indivisible particles called atoms and that atoms of a given element are all identical and can neither be created nor destroyed. Compounds are formed by combination of atoms in simple ratios to give compound atoms (molecules). The theory was the basis of modern chemistry
  • dandie dinmont terrier — any of a breed of small terrier with short legs, drooping ears, and a generally rough coat with a mass of silky hair on top of the head
  • data address generator — (architecture)   (DAG) The mechanism which generates temporary memory addresses for data that is transferred between memory and registers in a Digital Signal Processor. Certain DSP architectures incorporate more than one DAG to simplify the programming needed to move blocks of data between buffers. For instance, certain Fast Fourier Transform algorithms requiring bit reversing, can use the DAG for that purpose, or they can use two DAGS, one for Program Memory Data (PMD), and the other for Data Memory Data (DMD).
  • database administrator — (job)   A person responsible for the design and management of one or more databases and for the evaluation, selection and implementation of database management systems. In smaller organisations, the data administrator and database administrator are often one in the same; however, when they are different, the database administrator's function is more technical. The database administrator would implement the database software that meets the requirements outlined by the organisation's data administrator and systems analysts. Tasks might include controling an organisation's data resources, using data dictionary software to ensure data integrity and security, recovering corrupted data and eliminating data redundancy and uses tuning tools to improve database performance.
  • database normalisation — (database)   A series of steps followed to obtain a database design that allows for efficient access and storage of data in a relational database. These steps reduce data redundancy and the chances of data becoming inconsistent. A table in a relational database is said to be in normal form if it satisfies certain constraints. Codd's original work defined three such forms but there are now five generally accepted steps of normalisation. The output of the first step is called First Normal Form (1NF), the output of the second step is Second Normal Form (2NF), etc. First Normal Form eliminates repeating groups by putting each value of a multi-valued attribute into a new row. Second Normal Form eliminates functional dependencies on a partial key by putting the fields in a separate table from those that are dependent on the whole key. Third Normal Form eliminates functional dependencies on non-key fields by putting them in a separate table. At this stage, all non-key fields are dependent on the key, the whole key and nothing but the key. Fourth Normal Form separates independent multi-valued facts stored in one table into separate tables. Fifth Normal Form breaks out data redundancy that is not covered by any of the previous normal forms.
  • days of wine and roses — a period of happiness and prosperity.
  • de broglie wave length — the postulate of wave mechanics that a particle of mass m moving at a velocity v will have the properties of a wave of wavelength h / mv (de Broglie wavelength) where h is Planck's constant.
  • decompartmentalization — the act of decompartmentalizing
  • dehydroepiandrosterone — the most abundant steroid in the human body, that is involved in the manufacture of testosterone, oestrogen, progesterone, and corticosterone
  • delaunay triangulation — (mathematics, graphics)   (After B. Delaunay) For a set S of points in the Euclidean plane, the unique triangulation DT(S) of S such that no point in S is inside the circumcircle of any triangle in DT(S). DT(S) is the dual of the voronoi diagram of S.
  • delayed-action shutter — a camera shutter that opens after an interval set by the photographer
  • department of commerce — the department of the U.S. federal government that promotes and administers domestic and foreign commerce. Abbreviation: DOC.
  • descriptive cataloging — the aspect of cataloging concerned with the bibliographic and physical description of a book, recording, or other work, accounting for such items as author or performer, title, edition, and imprint as opposed to subject content.
  • developmental disorder — any condition, such as autism or dyslexia, that appears in childhood and is characterized by delay in the development of one or more psychological functions, such as language skill
  • dicyclopentadienyliron — ferrocene (def 1).
  • digital control system — (systems)   (DCS) A digital computer used for real-time control of a dynamic system, usually in an industrial environment, possibly as part of a Supervisory Control and Data Acquisition (SCADA) system. A DCS samples feedback from the system under control and modifies the control signals in an attempt to achieve some desired behaviour. Analysis of such digital-analogue feedback systems can involve mathematical methods such as difference equations, Laplace transforms, z transfer functions, state space models and state transition matrices.
  • digital radio mondiale — (communications)   (DRM) A form of monaural digital broadcast using carrier frequencies below 30 MHz. DRM uses MPEG-4 AAC Main Profile and SBR at data rates of 16-25 kbps.
  • dihydroxyphenylalanine — dopa.
  • dilation and curettage — a surgical method for the removal of diseased tissue or an early embryo from the lining of the uterus by means of scraping.
  • directional derivative — the limit, as a function of several variables moving along a given line from one specified point to another on the line, of the difference in the functional values at the two points divided by the distance between the points.
  • directional microphone — a microphone that has a greater sensitivity to sounds coming from a particular area in front of it: used to eliminate unwanted sounds.
  • director of admissions — a member of a university staff who is in overall charge of admissions to the university and its courses
  • directory system agent — (DSA) The software that provides the X.500 Directory Service for a portion of the directory information base. Generally, each DSA is responsible for the directory information for a single organisation or organisational unit.
  • disciplinary committee — a committee charged with examining alleged breaches of discipline within an organization, profession, etc and adjudicating on them
  • dishonorable discharge — the discharge of a person from military service for an offense more serious than one for which a bad-conduct discharge is given.
  • distributed generation — A distributed generation system involves a person or company generating some of their power requirements in different ways, such as locally, or using renewable energy, in order to avoid taking it all from the grid.
  • distributive education — a special program of vocational education at the high-school level in which a student is employed part-time, receiving on-the-job training, and also attends classes, most of which pertain directly to the student's vocational field.
  • do a number on someone — to manipulate or trick someone
  • dog's dinner/breakfast — You describe something as a dog's breakfast or dog's dinner in order to express your disapproval of it, for example because it is very untidy, badly organized, or badly done.
  • dominant seventh chord — a chord consisting of the dominant and the major third, perfect fifth, and minor seventh above it. Its most natural resolution is to a chord on the tonic
  • don't hold your breath — sth is unlikely to happen soon
  • don't misunderstand me — You can say don't misunderstand me when you want to correct a wrong impression that you think someone may have got about what you are saying.
  • earn one's daily bread — to earn one's living
  • earth inductor compass — a compass actuated by induction from the earth's magnetic field.
  • east african community — an association established in 1967 by Kenya, Uganda, and Tanzania to promote closer economic and social ties between member states: dissolved in 1977, but reformed in 1999, and joined in 2007 by Burundi and Rwanda
  • economy-class syndrome — Economy-class syndrome is a serious medical condition caused by blood clots in the legs moving up to the lungs; used especially in connection with long-haul flights.
  • electroencephalographs — Plural form of electroencephalograph.
  • electroencephalography — The measurement of electrical activity in different parts of the brain and the recording of such activity as a visual trace (on paper or on an oscilloscope screen).
  • electromagnetic moment — a measure of the magnetic strength of a magnet or current-carrying coil, expressed as the torque produced when the magnet or coil is set with its axis perpendicular to unit magnetic flux density. It is measured in ampere metres squared
  • electronic mail client — mail user agent
  • electrothermal printer — a printer that produces characters by burning the image on specially coated paper
  • emergency road service — a form of motoring insurance that sends assistance to drivers when their vehicles break down on a journey; it is provided either by the national or regional automobile association or by a private insurance company
  • employers' association — a body of employers, usually from the same sector of the economy, associated to further the interests of member companies by conducting negotiations with trade unions, providing advice, making representations to other bodies, etc
  • end transmission block — (character)   (ETB) The mnemonic for ASCII character 23.
  • endotrophic mycorrhiza — the most widespread and common type of mycorrhiza, in which the fungus lives within the cells of the roots of the plant
  • engineering consultant — a consultant specializing in engineering
  • english cocker spaniel — any of a breed of small spaniel, similar to and the progenitor of the cocker spaniel
  • enhanced parallel port — (hardware)   (EPP) A parallel port that confirms to the IEEE's EPP standard. An EPP is actually an expansion bus that can handle 64 disk drives and other peripherals.
  • european economic area — a free-trade area created in 1994 by an agreement between the European Free Trade Association (EFTA), excluding Switzerland, and the European Union (EU)
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