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19-letter words containing r, a, t, s

  • current transformer — A current transformer is a transformer that is designed to give an accurate current ratio for the purpose of measurement and control.
  • customs declaration — a form declaring the nature and value of goods, etc, for customs purposes
  • customs regulations — the regulations relating to customs in a particular country
  • daisy-wheel printer — a type of printer that uses a daisywheel
  • datatron 200 series — (computer)   A family of computers produced by Burroughs that included the Datatron 204 and Datatron 220.
  • de-militarised zone — (networking)   (DMZ) (From the military term for an area between two opponents where fighting is prevented) DMZ Ethernets connect networks and computers controlled by different bodies. They may be external or internal. External DMZ Ethernets link regional networks with routers to internal networks. Internal DMZ Ethernets link local nodes with routers to the regional networks. Compare red zone.
  • deacetyltransferase — (enzyme) Any of a class of enzymes that remove acetyl groups, especially from a lysine residue of a histone.
  • declare an interest — to make known one's connection, esp a prejudicial connection, with an affair
  • deflate compression — deflate
  • deflationary spiral — Geometry. a plane curve generated by a point moving around a fixed point while constantly receding from or approaching it.
  • deindustrialisation — Alternative spelling of deindustrialization.
  • deindustrialization — the decline in importance of manufacturing industry in the economy of a nation or area
  • demonstration model — a nearly new product, such as a car or washing machine, that has been used only to demonstrate its performance by a dealer and is offered for sale at a discount
  • dental receptionist — a receptionist working in a dental surgery
  • department of state — the department of the U.S. federal government that sets forth and maintains the foreign policy of the U.S., especially in negotiations with foreign governments and international organizations. Abbreviation: DOS.
  • departmentalisation — Alternative spelling of departmentalization.
  • dependable software — software reliability
  • desargues's theorem — the theorem that if two triangles are so related that the lines joining corresponding vertices meet in a point, then the extended corresponding lines of the two triangles meet in three points, all on the same line.
  • descriptive grammar — an approach to grammar that is concerned with reporting the usage of native speakers without reference to proposed norms of correctness or advocacy of rules based on such norms.
  • design in real time — (programming)   (Dirt) A user interface builder for the X Window System by R. Hesketh.
  • dictionary of names — a dictionary of given names that indicates whether a name is usually male, female, or unisex and often includes origins as well as meanings; for example, as by indicating that Evangeline, meaning “good news,” comes from Greek. Used primarily as an aid in selecting a name for a baby, dictionaries of names may also include lists of famous people who have shared a name and information about its current popularity ranking.
  • dielectric constant — Electricity. the ratio of the flux density produced by an electric field in a given dielectric to the flux density produced by that field in a vacuum.
  • digital electronics — (electronics)   The implementation of two-valued logic using electronic logic gates such as and gates, or gates and flip-flops. In such circuits the logical values true and false are represented by two different voltages, e.g. 0V for false and +5V for true. Similarly, numbers are normally represented in binary using two different voltages to represented zero and one. Digital electronics contrasts with analogue electronics which represents continuously varying quantities like sound pressure using continuously varying voltages. Digital electronics is the foundation of modern computers and digital communications. Massively complex digital logic circuits with millions of gates can now be built onto a single integrated circuit such as a microprocessor and these circuits can perform millions of operations per second.
  • dimethylnitrosamine — a yellow, water-soluble carcinogenic liquid, C 2 H 6 N 2 O, found in tobacco smoke and certain foods: known to be a potent carcinogen. Abbreviation: DMN, DMNA.
  • direct grant school — (in Britain, formerly) a school financed by endowment, fees, and a state grant conditional upon admittance of a percentage of nonpaying pupils nominated by the local education authority
  • disaster capitalism — the practice (by a government, regime, etc) of taking advantage of a major disaster to adopt liberal economic policies that the population would be less likely to accept under normal circumstances
  • disciplinary action — punishment or caution
  • discretionary trust — a trust in which the beneficiaries' shares are not fixed in the trust deed but are left to the discretion of other persons, often the trustees
  • discriminated union — (theory)   The discriminated union of two sets A and B is A + B = {(inA, a) | a in A} U {(inB, b)| b in B} where inA and inB are arbitrary tags which specify which summand an element originates from. A type (especially an algebraic data type) might be described as a discriminated union if it is a sum type whose objects consist of a tag to say which part of the union they belong to and a value of the corresponding type.
  • disenfranchisements — Plural form of disenfranchisement.
  • dispatch department — the department of an organization responsible for the dispatch of orders
  • dispersion relation — the relationship between the angular frequency (ω;) of a wave and the magnitude of its wave vector (k). Thus the wave's speed is ω/k
  • display advertising — display ads taken collectively.
  • disseminated cancer — a cancerous tumour that has spread from the site of original growth to a secondary site
  • distance university — a degree-granting institution operating wholly or mainly by correspondence courses for students not resident on or within commuting distance of the campus.
  • distinctive feature — a feature of the sound system of a language that serves as the crucial distinguishing mark between two phonemes, as the distinctive feature of voicing, which distinguishes b from p in English, or nasality, which distinguishes m from b and p.
  • diversional therapy — the structured use of leisure time in recreation and play as a form of or supplement to conventional therapy
  • dutchman's-breeches — a plant, Dicentra cucullaria, of the fumitory family, having long clusters of pale-yellow, two-spurred flowers.
  • dynamic translation — (architecture)   A virtual machine implementation approach, used to speed up execution of byte-code programs. To execute a program unit such as a method or a function, the virtual machine compiles its bytecodes into (hardware) machine code. The translated code is also placed in a cache, so that next time that unit's machine code can be executed immediately, without repeating the translation. This technique was pioneered by the commercial Smalltalk implementation currently known as VisualWorks, in the early 1980s. Currently it is also used by some implementations of the Java Virtual Machine under the name JIT (Just In Time compilation).
  • dynatron oscillator — type of oscillator
  • east dunbartonshire — a council area of central Scotland to the N of Glasgow: part of Strathclyde region from 1975 until 1996: mainly agricultural and residential. Administrative centre: Kirkintilloch. Pop: 106 970 (2003 est). Area: 172 sq km (66 sq miles)
  • east-west relations — relations between the United States and its allies in the western alliance and the Soviet Union, it allies and other Communist countries, especially during the period between the end of World War II and the fall of the Soviet regime
  • eastern coral snake — any of numerous venomous elapid snakes, found chiefly in the New World tropics, as Micrurus fulvius (eastern coral snake) of the southeastern U.S., often brilliantly marked with bands of red, yellow, and black.
  • eat one's heart out — Anatomy. a hollow, pumplike organ of blood circulation, composed mainly of rhythmically contractile smooth muscle, located in the chest between the lungs and slightly to the left and consisting of four chambers: a right atrium that receives blood returning from the body via the superior and inferior vena cavae, a right ventricle that pumps the blood through the pulmonary artery to the lungs for oxygenation, a left atrium that receives the oxygenated blood via the pulmonary veins and passes it through the mitral valve, and a left ventricle that pumps the oxygenated blood, via the aorta, throughout the body.
  • ecatepec de morelos — a city in S central Mexico, a suburb of Mexico City: on a 12th-century Aztec site.
  • educational adviser — a person who provides advice and training to teachers about teaching methods and educational policies
  • effervescent tablet — Effervescent tablets break down quickly when they are dropped into water or another liquid.
  • elastic deformation — In elastic deformation a material changes shape when a stress is applied to it but goes back to its original state when the stress is removed.
  • elastomeric closure — An elastomeric closure is a component that closes a piece of packaging. An elastomeric closure is made from a material that is able to resume its original shape when it is removed from the packaging and may be in direct contact with the drug enclosed in the pack.
  • electro-shock baton — a baton used as a weapon to pass an electric current through part of the body
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