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

  • differentiability — The ability to be differentiated.
  • differential gear — differential (def 7).
  • differential line — (hardware)   A kind of electrical connection using two wires, one of which carries the normal signal (V) and the other carries an inverted version the signal (-V). A differential amplifier at the receiver subtracts the inverted signal from the normal signal to yield a signal proportional to V. This subtraction is intended to cancel out any noise induced in the wires, on the assmption that the same level of noise will have been induced in both wires. Twisted pair wiring is often used to try to ensure that this is the case. The two wires might be connected at the receiver to separate analogue to digital converters and the subtraction performed digitally. The RS-422 serial line standard specifies differential drivers and receivers, whereas the earlier RS-232 standard does not. Opposite: single ended.
  • differential rate — a special lower rate, as one charged by one of two or more competing businesses.
  • differential tone — a musical sound sometimes heard when two loud notes are sounded together, lower in pitch than either
  • digital dashboard — (software)   A personalised desktop portal that focuses on business intelligence and knowledge management.
  • digital footprint — one's unique set of digital activities, actions, and communications that leave a data trace on the Internet or on a computer or other digital device and can identify the particular user or device: Our online browsing habits are part of our passive digital footprint, created without our consent or knowledge, but our active digital footprint, especially on social media, can more easily be managed. Compare footprint (def 4).
  • digital immigrant — a person who has become familiar with computers, the Internet, and other digital technology as a young adult or later in life. Compare digital native.
  • digital recording — a method of sound recording in which an input audio waveform is sampled at regular intervals, usually between 40,000 and 50,000 times per second, and each sample is assigned a numerical value, usually expressed in binary notation.
  • digital signature — an encrypted digital code appended to an electronic document to verify that it was created by a known source and has not been altered.
  • dihydroergotamine — an ergot alkaloid, C 33 H 37 N 5 O 5 , used in the treatment of various types of migraine headache.
  • dimethylformamide — a colourless liquid widely used as a solvent and sometimes as a catalyst. Formula: (CH3)2NCHO
  • dimethylhydrazine — a flammable, highly toxic, and colorless liquid, C 2 H 8 N 2 , used as a component in jet and rocket fuels.
  • dipterocarpaceous — of, relating to, or belonging to the Dipterocarpaceae, a family of trees chiefly native to tropical SE Asia, having two-winged fruits. Many species yield useful timber and resins
  • dirt track racing — motorcycle racing on a dirt track
  • disaster planning — disaster recovery
  • disaster recovery — (business)   (DR) Planning and implementation of procedures and facilities for use when essential systems are not available for a period long enough to have a significant impact on the business, e.g. when the head office is blown up. Disasters include natural: fire, flood, lightning, hurricane; hardware: power failure, component failure, head crash; software failure: bugs, resources; vandalism: arson, bombing, cracking, theft; data corruption or loss: human error, media failure; communications: computer network equipment, network storm, telephones; security: passwords compromised, computer virus; legal: change in legislation; personnel: unavailability of essential staff, industrial action. Companies need to plan for disaster: before: risk analysis, preventive measures, training; during: how should staff and systems respond; after: recovery measures, post mortem analysis. Hardware can usually be replaced and is usually insured. Software and data needs to be backed up off site. Alternative communication systems should be arranged in case of network failure or inaccessible premises, e.g. emergency telephone number, home working, alternative data center.
  • discreditableness — Quality of being discreditable.
  • discrete variable — a variable that may assume only a countable, and usually finite, number of values.
  • disintermediation — the act of removing funds from savings banks and placing them into short-term investments on which the interest-rate yields are higher.
  • display standards — display standard
  • disproportionally — not in proportion; disproportionate.
  • disproportionates — Third-person singular simple present indicative form of disproportionate.
  • disrespectability — Lack of respectability.
  • disruptive action — action performed by protestors, workers, etc that causes the disruption of a service
  • dissipation trail — a clear rift left behind an aircraft flying through a thin cloud layer.
  • dissociated press — [Play on "Associated Press"; perhaps inspired by a reference in the 1949 Bugs Bunny cartoon "What's Up, Doc?"] An algorithm for transforming any text into potentially humorous garbage even more efficiently than by passing it through a marketroid. The algorithm starts by printing any N consecutive words (or letters) in the text. Then at every step it searches for any random occurrence in the original text of the last N words (or letters) already printed and then prints the next word or letter. Emacs has a handy command for this. Here is a short example of word-based Dissociated Press applied to an earlier version of the Jargon File: wart: A small, crocky feature that sticks out of an array (C has no checks for this). This is relatively benign and easy to spot if the phrase is bent so as to be not worth paying attention to the medium in question. Here is a short example of letter-based Dissociated Press applied to the same source: window sysIWYG: A bit was named aften /bee't*/ prefer to use the other guy's re, especially in every cast a chuckle on neithout getting into useful informash speech makes removing a featuring a move or usage actual abstractionsidered interj. Indeed spectace logic or problem! A hackish idle pastime is to apply letter-based Dissociated Press to a random body of text and vgrep the output in hopes of finding an interesting new word. (In the preceding example, "window sysIWYG" and "informash" show some promise.) Iterated applications of Dissociated Press usually yield better results. Similar techniques called "travesty generators" have been employed with considerable satirical effect to the utterances of Usenet flamers; see pseudo.
  • dissolve in tears — weep
  • distance learning — education in which students receive instruction over the Internet, from a video, etc., instead of going to school.
  • distillers' grain — a by-product of the distillation process for making whisky, used as an animal foodstuff
  • district attorney — an officer who acts as attorney for the people or government within a specified district.
  • document examiner — (hypertext, tool)   A high-performance hypertext system by Symbolics that provides on-line access to their user documentation.
  • dog in the manger — a person who selfishly keeps something that he or she does not really need or want so that others may not use or enjoy it.
  • dollars-and-cents — considered strictly in terms of money: from a dollars-and-cents viewpoint.
  • doorstep salesman — a door-to-door salesman
  • double quatrefoil — a charge having the form of a foil with eight leaves, used especially as the cadency mark of a ninth son.
  • double refraction — the separation of a ray of light into two unequally refracted, plane-polarized rays of orthogonal polarizations, occurring in crystals in which the velocity of light rays is not the same in all directions.
  • double track line — a railway line with double track
  • douglas engelbart — (person)   Douglas C. Engelbart, the inventor of the mouse. On 1968-12-09, Douglas C. Engelbart and the group of 17 researchers working with him in the Augmentation Research Center at Stanford Research Institute in Menlo Park, California, USA, presented a 90-minute live public demonstration of the on live system, NLS, they had been working on since 1962. The presentation was a session in the of the Fall Joint Computer Conference held at the Convention Center in San Francisco, and it was attended by about 1000 computer professionals. This was the public debut of the computer mouse, hypertext, object addressing, dynamic file linking and shared-screen collaboration involving two persons at different sites communicating over a network with audio and video interface. The original 90-minute video: Hyperlinks, Mouse, Web-board.
  • douglas macarthur — Douglas, 1880–1964, U.S. general: supreme commander of allied forces in SW Pacific during World War II and of UN forces in Korea 1950–51.
  • downward mobility — movement from one social level to a higher one (upward mobility) or a lower one (downward mobility) as by changing jobs or marrying.
  • dramatis personae — (used with a plural verb) the characters in a play.
  • drawn-thread work — ornamental needlework done by drawing threads out of the fabric and using the remaining threads to form lacelike patterns
  • dressed up as sth — portrayed as
  • drilling platform — a structure, either fixed to the sea bed or mobile, which supports the machinery and equipment (the drilling rig), together with the stores, required for digging an offshore oil well
  • drinking fountain — a water fountain that ejects a jet of water for drinking without a cup.
  • drive to the wall — to force into an awkward situation
  • drive up the wall — to cause to become crazy or furious
  • duality principle — the principle that a mathematical duality exists under certain conditions.
  • ductus arteriosis — a fetal blood vessel that connects the left pulmonary artery directly to the descending aorta, normally closing after birth.
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