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22-letter words containing a, d, r, t

  • central locking device — a small device that controls the central locking on a motor vehicle
  • certificate of deposit — a negotiable certificate issued by a bank in return for a deposit of money for a term of up to five years
  • chicago board of trade — a major exchange in the United States that deals in futures, notably of grains and metals. Abbreviation: CBT.
  • chorionic gonadotropin — Also called human chorionic gonadotropin. Biochemistry. a hormone, produced in the incipient placenta of pregnant women, that stimulates the production of estrogen and progesterone: its presence in blood or urine is an indication of pregnancy.
  • classified advertising — advertising compactly arranged, as in newspaper columns, according to subject, under such listings as help wanted and lost and found
  • client-centred therapy — a form of psychotherapy in which the therapist makes no attempt to interpret what the patient says but encourages him or her to develop his or her own attitudes and insights, often by questioning
  • color graphics adapter — (hardware, graphics)   (CGA) One of IBM's earliest hardware video display standards for use in IBM PCs. CGA can display 80*25 or 40*25 text in 16 colors, 640*200 pixels of graphics in two colors or 320*200 in four colors (IBM PC video modes 0-6). It is now obsolete.
  • colorado potato beetle — a black and yellow leaf beetle, Leptinotarsa decemlineata, originally of Colorado and neighboring states but now a common pest in all potato-growing regions of the U.S.
  • comma separated values — (file format)   (CSV) A file format used as a portable representation of a database. Each line is one entry or record and the fields in a record are separated by commas. Commas may be followed by arbitrary space and/or tab characters which are ignored. If field includes a comma, the whole field must be surrounded with double quotes.
  • command line interface — (operating system)   A means of communication between a program and its user, based solely on textual input and output. Commands are input with the help of a keyboard or similar device and are interpreted and executed by the program. Results are output as text or graphics to the terminal. Command line interfaces usually provide greater flexibility than graphical user interfaces, at the cost of being harder for the novice to use. Consequently, some hackers look down on GUIs as designed For The Rest Of Them.
  • communication disorder — any of a number of disorders, as autism or deafness, that partially or totally prevent verbal or written expression or comprehension.
  • compass deviation card — a card, sheet, or the like, with two compass roses printed on it concentrically, for recording, on a given voyage, the amount of deviation for which the navigator must compensate in using the ship's compass to steer a magnetic course.
  • complementary medicine — the treatment, alleviation, or prevention of disease by such techniques as osteopathy, homeopathy, aromatherapy, and acupuncture, allied with attention to such factors as diet and emotional stability, which can affect a person's wellbeing
  • complete quadrilateral — a polygon consisting of four lines and their six points of intersection
  • compound annual return — the total return available from an investment, deposit, etc, when the interest earned is used to augment the capital
  • compulsory liquidation — the liquidation of a business in order to settle its debts
  • concentration gradient — the gradual difference in concentration of a dissolved substance in a solution between a region of high density and one of lower density.
  • congressional district — (in the US) an electoral division of a state, entitled to send one member to the US House of Representatives
  • constructive dismissal — If an employee claims constructive dismissal, they begin a legal action against their employer in which they claim that they were forced to leave their job because of the behaviour of their employer.
  • contextual advertising — a form of targeted advertising used on websites or other media, such as content displayed in mobile browsers
  • continuous welded rail — a long, continuous rail formed by welding many short rails.
  • contradiction in terms — a term, phrase, or phenomenon containing self-contradictory parts
  • coronary heart disease — any heart disorder caused by disease of the coronary arteries
  • corporate headquarters — the main offices of a corporation, from where it runs its business
  • crankshaft end bearing — The crankshaft end bearing is the bearing between the connecting rod and the crankshaft of an internal combustion engine.
  • cross the great divide — to die
  • curly-coated retriever — a strongly built variety of retriever with a tightly curled black or liver-coloured coat
  • curriculum coordinator — a member of a teaching staff with a largely administrative function whose job is to ensure that a curriculum is effectively taught
  • 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.
  • d'alembert's principle — the principle that for a moving body the external forces are in equilibrium with the inertial forces; a generalization of Newton's third law of motion
  • 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
  • damn with faint praise — If someone damns something with faint praise, they say something about it which sounds quite nice but is not enthusiastic, and shows that they do not have a high opinion of it.
  • 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
  • dashing white sergeant — a lively Scottish dance for sets of six people
  • 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.
  • 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.
  • descriptive statistics — the use of statistics to describe a set of known data in a clear and concise manner, as in terms of its mean and variance, or diagrammatically, as by a histogram
  • 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
  • diachronic linguistics — historical linguistics.
  • dicyclopentadienyliron — ferrocene (def 1).
  • diethylbarbituric acid — barbital
  • 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.
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