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19-letter words containing a, g, t

  • database management — the maintenance of information stored in a computer system
  • de broglie equation — 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.
  • 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.
  • diamond ring effect — a phenomenon, sometimes observed immediately before and after a total eclipse of the sun, in which one of Baily's beads is much brighter than the others, resembling a diamond ring around the moon.
  • diffraction grating — a band of equidistant, parallel lines, usually more than 5000 per inch (2000 per centimeter), ruled on a glass or polished metal surface for diffracting light to produce optical spectra.
  • digital certificate — (communications, security)   An attachment to an electronic mail message used for security purposes, e.g. to verify that a user sending a message is who he or she claims to be, and to provide the receiver with the means to encode a reply. An individual wishing to send an encrypted message applies for a digital certificate from a certificate authority (CA). The CA issues an encrypted digital certificate containing the applicant's public key and a variety of other identification information. The CA makes its own public key readily available on the Internet. The recipient of an encrypted message uses the CA's public key to decode the digital certificate attached to the message, verifies it as issued by the CA and then obtains the sender's public key and identification information held within the certificate.
  • 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.
  • digital linear tape — (storage)   (DLT) A kind of magnetic tape drive originally developed by DEC and now marketed by Quantum. DLT drives implement the Digital Lempel Ziv 1 (DLZ1) compression algorithm in a combination of hardware and firmware. They use a popular chip by Stac (now hi/fn) to do the string searching. Counting, sorting and Huffman coding are done in firmware (with hardware support for the Huffman algorithm?). In April 1997 DLT drives can transfer 5 megabytes per second and can store 35 gigabytes on a single cartridge. Compression might roughly double these figures.
  • digital photography — the taking or manipulation of photographs that are stored as data files on a computer.
  • 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
  • disadvantageousness — The state or quality of being disadvantageous.
  • disambiguation page — a page on a website that lists various websites or web pages that have or could have the same title. The user is able to select from the list that page, site etc that he or she actually wants
  • displacement engine — any engine employing the rectilinear motion of one or more pistons in cylinders.
  • display advertising — display ads taken collectively.
  • distinguishableness — The state or quality of being distinguishable.
  • ditty bag (or box) — a small bag (or box) used as by sailors for holding sewing equipment, toilet articles, etc.
  • dominant wavelength — the wavelength of monochromatic light that would give the same visual sensation if combined in a suitable proportion with an achromatic light
  • don the baggy green — to represent Australia at Test cricket
  • don't make me laugh — Some people reply to other people's comments or opinions by saying 'Don't make me laugh' when they disagree with them and think they are foolish or inaccurate.
  • duplicating machine — a duplicator, especially one for making identical copies of documents, letters, etc.
  • dynamic positioning — Dynamic positioning is the use of computers to control the position of a semi-submersible rig.
  • earthquake coverage — Earthquake coverage is insurance coverage for damage caused by earthquakes.
  • earthquake engineer — a civil engineer who studies the effects of seismic activity on structures and consults on earthquake-resistant design and construction.
  • economic management — the management of the resources, finances, income, and expenditure of a community, business enterprise, etc
  • electrical engineer — An electrical engineer is a person who uses scientific knowledge to design, construct, and maintain electrical devices.
  • electrocardiographs — Plural form of electrocardiograph.
  • electrocardiography — The measurement of electrical activity in the heart and the recording of such activity as a visual trace (on paper or on an oscilloscope screen), using electrodes placed on the skin of the limbs and chest.
  • electromagnetically — By means of electromagnetism.
  • electron micrograph — a photograph or image of a specimen taken using an electron microscope
  • electronegativities — Plural form of electronegativity.
  • electronic graphics — (on television) the production of graphic designs and text by electronic means
  • electronic magazine — (messaging, publication, web)   (e-zine) A regular publication on some particular topic distributed in digital form, chiefly now via the web but also by electronic mail or floppy disk. E-zines are often distributed for free by enthusiasts.
  • electropalatography — the study of the movements of the tongue during speech using touch-sensitive electrodes in the mouth linked to a computer
  • electrophotographic — Of or pertaining to electrophotography.
  • enabling technology — technology that enables the user to perform a task or to improve his or her overall performance: e.g. the internet
  • energy conservation — concerted formal or government action or policy to make sure that energy is not wasted
  • engineering factory — a factory where engineering products are made
  • english toy spaniel — breed of dog
  • entitlement program — a government program providing defined sectors of the population with social benefits
  • equatorial mounting — an astronomical telescope mounting that allows motion of the telescope about two mutually perpendicular axes, one of which is parallel to the earth's axis
  • error-based testing — (programming)   Testing where information about programming style, error-prone language constructs, and other programming knowledge is applied to select test data capable of detecting faults, either a specified class of faults or all possible faults.
  • essence of bergamot — a fragrant essential oil from the fruit rind of this plant, used in perfumery and some teas (including Earl Grey)
  • euclidean algorithm — Euclid's Algorithm
  • evaluation strategy — reduction strategy
  • evaporative cooling — a method of reducing temperature that uses evaporation
  • executive agreement — an agreement made between the US President and the head of a foreign state, having the effect of a treaty
  • exophthalmic goiter — a disease of unknown cause characterized by enlargement of the thyroid gland, overproduction of the thyroid hormone, and abnormal protrusion of the eyeballs
  • exophthalmic goitre — a form of hyperthyroidism characterized by enlargement of the thyroid gland, protrusion of the eyeballs, increased basal metabolic rate, and weight loss
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