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

  • 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
  • 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
  • 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
  • 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.
  • 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.
  • digital standard mumps — (DSM) DEC's version of MUMPS.
  • digital versatile disc — (storage)   (DVD, formerly "Digital Video Disc") An optical storage medium with improved capacity and bandwidth compared with the Compact Disc. DVD, like CD, was initally marketed for entertainment and later for computer users. [When was it first available?] A DVD can hold a full-length film with up to 133 minutes of high quality video, in MPEG-2 format, and audio. The first DVD drives for computers were read-only drives ("DVD-ROM"). These can store 4.7 GBytes - over seven times the storage capacity of CD-ROM. DVD-ROM drives read existing CD-ROMs and music CDs and are compatible with installed sound and video boards. Additionally, the DVD-ROM drive can read DVD films and modern computers can decode them in software in real-time. The DVD video standard was announced in November 1995. Matshusita did much of the early development but Philips made the first DVD player, which appeared in Japan in November 1996. In May 2004, Sony released the first dual-layer drive, which increased the disc capacity to 8.5 GB. Double-sided, dual-layer discs will eventually increase the capacity to 17 GB. Write-once DVD-R ("recordable") drives record a 3.9GB DVD-R disc that can be read on a DVD-ROM drive. Pioneer released the first DVD-R drive on 1997-09-29. By March 1997, Hitachi had released a rewritable DVD-RAM drive (by false analogy with random-access memory). DVD-RAM drives read and write to a 2.6 GB DVD-RAM disc, read and write-once to a 3.9GB DVD-R disc, and read a 4.7 GB or 8.5 GB DVD-ROM. Later, DVD-RAM discs could be read on DVD-R and DVD-ROM drives.
  • digital video recorder — See DVR.
  • 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.
  • directed acyclic graph — (DAG) A directed graph containing no cycles. This means that if there is a route from node A to node B then there is no way back.
  • 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.
  • disciplinary committee — a committee charged with examining alleged breaches of discipline within an organization, profession, etc and adjudicating on them
  • disposable soma theory — the theory that ageing is caused by the body having increasingly fewer resources to allocate towards repairing wear and damage to tissues
  • don't hold your breath — sth is unlikely to happen soon
  • draft-quality printing — low-quality, high-speed output in printed form from a printer linked to a word processor
  • drumhead court-martial — a court-martial held, usually on a battlefield, for the summary trial of charges of offenses committed during military operations.
  • east greenland current — a cold ocean current of low salinity flowing south along the east coast of Greenland.
  • end transmission block — (character)   (ETB) The mnemonic for ASCII character 23.
  • 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.
  • equal rights amendment — a proposed amendment to the US Constitution enshrining equality between the sexes
  • experimental condition — one of the distinct states of affairs or values of the independent variable for which the dependent variable is measured in order to carry out statistical tests or calculations
  • extra-mural department — a university department that offers courses for part-time students
  • federal district court — district court (def 2).
  • federal maritime board — the body responsible for regulating commerce by US and international shipping in US waters
  • federal reserve system — a U.S. federal banking system that is under the control of a central board of governors (Federal Reserve Board) with a central bank (Federal Reserve Bank) in each of 12 districts and that has wide powers in controlling credit and the flow of money as well as in performing other functions, as regulating and supervising its member banks.
  • fetal alcohol syndrome — a pattern of birth defects caused by maternal consumption of alcohol during pregnancy: considered as one of the fetal alcohol spectrum disorders. Abbreviation: FAS.
  • financial underwriting — Financial underwriting is the process of assessing whether the proposed sum insured and product are reasonable when considering the possible financial loss to the client.
  • fitzgerald contraction — the hypothesis that a moving body exhibits a contraction in the direction of motion when its velocity is close to the speed of light.
  • forth modification lab — (event)   (FORML) A Forth conference held every November on the West coast of the USA ().
  • gallamine triethiodide — a neuromuscular blocking drug, C 30 H 60 I 3 N 3 O 3 , similar to curare, used as a skeletal muscle relaxant in conjunction with surgical anesthesia.
  • generalized coordinate — Usually, generalized coordinates. one of a minimum set of coordinates needed to specify the state or position of a given system.
  • gold-exchange standard — a monetary system in one country in which currency is maintained at a par with that of another country that is on the gold standard.
  • graphical display unit — an output device incorporating a cathode ray tube on which both line drawings and text can be displayed. It is usually used in conjunction with a light pen to input or reposition data
  • gravitational redshift — (in general relativity) the shift toward longer wavelengths of electromagnetic radiation emitted by a source in a gravitational field, especially at the surface of a massive star.
  • great glen of scotland — Glen More
  • great salt lake desert — an arid region in NW Utah, extending W from the Great Salt Lake to the Nevada border. 110 miles (177 km) long; about 4000 sq. mi. (10,360 sq. km).
  • green around the gills — the respiratory organ of aquatic animals, as fish, that breathe oxygen dissolved in water.
  • gridiron-tailed lizard — zebra-tailed lizard.
  • gross national product — the total monetary value of all final goods and services produced in a country during one year. Abbreviation: GNP.
  • hammersmith and fulham — a borough of Greater London on the River Thames: established in 1965 by the amalgamation of Fulham and Hammersmith. Pop: 174 200 (2003 est). Area: 16 sq km (6 sq miles)
  • harvard classification — a classification of stars based on the characteristic spectral absorption lines and bands of the chemical elements present
  • horn-rimmed spectacles — spectacles with rims made of material resembling horn
  • hospital administrator — a person who works in the management team of a hospital
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