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18-letter words containing d, o, n

  • demorgan's theorem — (logic)   A logical theorem which states that the complement of a conjunction is the disjunction of the complements or vice versa. In symbols: not (x and y) = (not x) or (not y) not (x or y) = (not x) and (not y) E.g. if it is not the case that I am tall and thin then I am either short or fat (or both). The theorem can be extended to combinations of more than two terms in the obvious way. The same laws also apply to sets, replacing logical complement with set complement, conjunction ("and") with set intersection, and disjunction ("or") with set union. A (C) programmer might use this to re-write if (!foo && !bar) ... as if (!(foo || bar)) ... thus saving one operator application (though an optimising compiler should do the same, leaving the programmer free to use whichever form seemed clearest).
  • dendrochronologist — One who carries out dendrochronology.
  • departmental store — a department store.
  • derestriction sign — a circular white sign with a black diagonal band signifying the lifting of any other speed restriction
  • desalination plant — a factory where salt is removed from salt water in order to make the water suitable for drinking and irrigation
  • desktop publishing — Desktop publishing is the production of printed materials such as newspapers and magazines using a desktop computer and a laser printer, rather than using conventional printing methods. The abbreviation DTP is also used.
  • determinate growth — growth of a plant stem that is terminated early by the formation of a bud
  • developing country — a nonindustrialized poor country that is seeking to develop its resources by industrialization
  • development period — a length of time during which a company grows
  • development system — a computer system, including hardware and software, that is specifically designed to aid in the development of software and interfaces
  • diagnostic testing — Diagnostic testing is the testing of a vehicle, or one of its systems or parts, in order to identify why it is not working properly.
  • diaminofluorescein — (organic compound) A fluorescein into which two amino groups have been substituted.
  • diamondback turtle — any edible North American terrapin of the genus Malaclemys, esp M. terrapin, occurring in brackish and tidal waters and having diamond-shaped markings on the shell: family Emydidae
  • diazonium compound — any of a series of compounds that contain the group ArN 2 –, in which Ar represents an aryl group.
  • dictionary catalog — a library catalog having all its entries, including authors, titles, subjects, etc., in one general alphabetical sequence.
  • didaskaleinophobia — The fear of going to school.
  • didot point system — a Continental system of measurement for type, based on a unit of 0.0148 inches (0.3759 mm).
  • dig in one's heels — to refuse to give up or modify one's opinion, policy, attitude, etc., esp. when faced with opposition
  • dig one's heels in — to refuse stubbornly to move or be persuaded
  • digital technology — the branch of scientific or engineering knowledge that deals with the creation and practical use of digital or computerized devices, methods, systems, etc.: advances in digital technology.
  • digital television — a television broadcasting technology in which signals are transmitted as a sequence of binary numbers.
  • dimensionalisation — Alternative spelling of dimensionalization.
  • dimensionalization — The process of dimensionalizing.
  • direct examination — the first interrogation of a witness by the side that has called that witness.
  • directional signal — any of four signal lights on the front left, front right, rear left, and rear right of an automotive vehicle that, when actuated by the driver, flash in pairs on the side toward which a turn is to be made.
  • disability pension — a pension paid to people who are unable to continue to work because of a disability
  • discourse analysis — the study of the rules or patterns characterizing units of connected speech or writing longer than a sentence.
  • disidentifications — Plural form of disidentification.
  • disorderly conduct — any of various petty misdemeanors, generally including nuisances, breaches of the peace, offensive or immoral conduct in public, etc.
  • dispatch documents — documents sent with a parcel, etc, detailing information such as contents, delivery address, etc
  • disproportionality — not in proportion; disproportionate.
  • disproportionately — not proportionate; out of proportion, as in size or number.
  • disproportionation — the simultaneous oxidation and reduction of a substance reacting with itself, thereby forming two dissimilar molecules, as 2C 2 H 4 →C 2 H 6 +C 2 H 2 .
  • dissenting opinion — (in appellate courts) an opinion filed by a judge who disagrees with the majority decision of a case.
  • distance education — education in which students receive instruction over the Internet, from a video, etc., instead of going to school.
  • distribution class — form class
  • distribution curve — the curve or line of a graph in which cumulative frequencies are plotted as ordinates and values of the variate as abscissas.
  • distribution ratio — the ratio of concentrations of a solute distributed between two immiscible solvents in contact with each other, as iodine in water and chloroform
  • divine inspiration — insight provided by higher power
  • division algorithm — the theorem that an integer can be written as the sum of the product of two integers, one a given positive integer, added to a positive integer smaller than the given positive integer. Compare Euclidean algorithm.
  • division of labour — a system of organizing the manufacture of an article in a series of separate specialized operations, each of which is carried out by a different worker or group of workers
  • do a roaring trade — If someone does a roaring trade in a type of goods, they sell a lot of them.
  • do not give a hoot — If you say that you don't give a hoot or don't care two hoots about something, you are emphasizing that you do not care at all about it.
  • do one's own thing — a material object without life or consciousness; an inanimate object.
  • do oneself justice — If you do yourself justice, you do something as well as you are capable of doing it.
  • doctype decoration — (humour)   When a web author adds a doctype declaration but doesn't bother to write valid HTML.
  • dodecadodecahedron — (geometry) A nonconvex polyhedron with twenty-four faces, thirty vertices, and sixty edges.
  • domain engineering — (systems analysis)   1. The development and evolution of domain specific knowledge and artifacts to support the development and evolution of systems in the domain. Domain engineering includes engineering of domain models, components, methods and tools and may also include asset management. 2. The engineering process of analysing and modelling a domain, designing and modelling a generic solution architecture for a product line within that domain, implementing and using reusable components of that architecture and maintaining and evolving the domain, architecture and implementation models. 3. A reuse-based approach to defining the scope (domain definition), specifying the structure (domain architecture) and building the Assets (requirements, designs, software code, documentation) for a class of systems, subsystems or applications. Domain engineering can include domain definition, domain analysis, developing the domain architecture domain implementation.
  • domain name server — (spelling)   Domain Name System.
  • domain name system — (networking)   (DNS) A general-purpose distributed, replicated, data query service chiefly used on Internet for translating hostnames into Internet addresses. Also, the style of hostname used on the Internet, though such a name is properly called a fully qualified domain name. DNS can be configured to use a sequence of name servers, based on the domains in the name being looked for, until a match is found. The name resolution client (e.g. Unix's gethostbyname() library function) can be configured to search for host information in the following order: first in the local hosts file, second in NIS and third in DNS. This sequencing of Naming Services is sometimes called "name service switching". Under Solaris is configured in the file /etc/nsswitch.conf. DNS can be queried interactively using the command nslookup. It is defined in STD 13, RFC 1034, RFC 1035, RFC 1591.
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