19-letter words containing r, o, d, e
- cyril of alexandria — Saint. ?375–444 ad, Christian theologian and patriarch of Alexandria. Feast day: June 27 or June 9
- data encryption key — (DEK) Used for the encryption of message text and for the computation of message integrity checks (signatures). See cryptography.
- data protection act — (legal) (DPA) A UK law guaranteeing rights to individuals in relation to personal data that others hold on them. For example, under the DPA, you have the right to see what data a company holds on you.
- datatron 200 series — (computer) A family of computers produced by Burroughs that included the Datatron 204 and Datatron 220.
- davy jones's locker — the bottom of the sea; grave of those drowned at sea or buried there
- 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.
- de moivre's theorem — the theorem that a complex number raised to a given positive integral power is equal to the modulus of the number raised to the power and multiplied by the amplitude times the given power.
- de-compartmentalize — to divide into categories or compartments.
- de-internationalize — to make international, as in scope or character: a local conflict that was internationalized into a major war.
- 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.
- declaration of love — a statement made by one person to another in which they say they are in love with the other person
- 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
- demon internet ltd. — (company) One of the first company to provide public Internet access in the UK. The staff of Demon Systems Ltd., an established software house, started Demon Internet on 1992-06-01 and it was the first system in the United Kingdom to offer low cost full Internet access. It was started with the support of about 100 founder members who discussed the idea on Compulink Information Exchange, and were brave enough to pay a year's subscription in advance. They aimed to have 200 members in the first year to cover costs, ignoring any time spent. After about two weeks they realised they needed nearer 400. By November 1993 they had over 2000 subscribers and by August 1994 they had about 11000 with 20% per month growth. All revenues have been reinvested in resources and expansion of service. Demon link to Sprintlink in the United States making them totally independent. They peer with EUNet and PIPEX to ensure good connectivity in Great Britain as well as having links to the JANET/JIPS UK academic network. A direct line into the Department of Computing, Imperial College, London from their Central London Point of Presence (PoP) (styx.demon.co.uk) gives access to the biggest FTP and Archie site in Europe. Demon provide local call access to a large proportion of the UK. The central London PoP provides leased line connections at a cheaper rate for those customers in the central 0171 area. Further lines and PoPs are being added continuously. Subscribers get allocated an Internet Address and can choose a hostname within the demon.co.uk domain. They can have any number of e-mail address at that host. In October 1994 Demon confirmed a large contract with the major telecommunications provider Energis. They will supply guaranteed bandwidth to Demon's 10Mb/s backbone from several cities and towns. Several PoPs will be phased out and replaced with others during 1995. E-mail: <[email protected]>. Telephone: +44 (181) 349 0063. Address: Demon Internet Ltd., 42 Hendon Lane, Finchley, London N3 1TT, UK.
- 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
- dendrochronological — Pertaining to dendrochronology.
- dendrogeomorphology — (geology) the science that uses dendrochronology to study changes to the Earth's surface over time.
- dental receptionist — a receptionist working in a dental surgery
- deoxycorticosterone — a corticosteroid hormone important in maintaining sodium and water balance in the body
- deoxyribonucleoside — a compound composed of deoxyribose and either a purine or a pyrimidine.
- deoxyribonucleotide — an ester of a deoxyribonucleoside and phosphoric acid; a constituent of DNA.
- department of labor — the department of the U.S. federal government that promotes and improves the welfare, opportunities, and working conditions of wage earners. Abbreviation: DOL.
- 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.
- departmentalization — to divide into departments.
- dependable software — software reliability
- dereliction of duty — Dereliction of duty is deliberate or accidental failure to do what you should do as part of your job.
- 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.
- detective inspector — a police officer who investigates crime and who ranks above a detective sergeant but below a detective chief inspector
- developable surface — a surface that can be flattened onto a plane without stretching or compressing any part of it, as a circular cone.
- devil's coach-horse — a large black rove beetle, Ocypus olens, with large jaws and ferocious habits
- devils-on-horseback — a savoury of prunes wrapped in bacon slices and served on toast
- diamond anniversary — a 60th, or occasionally 75th, anniversary
- 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.
- diamond-leaf laurel — a tree, Pittosporum rhombifolium, of Australia, having coarsely toothed, oval or diamond-shaped leaves and white flowers, widely planted as an ornamental in the southwestern U.S.
- 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.
- diethylstilbesterol — Misspelling of diethylstilbestrol\u200e.
- diethylstilboestrol — Diethylstilbestrol.
- difference equation — (mathematics) A relation between consecutive elements of a sequence. The first difference is D u(n) = u(n+1) - u(n) where u(n) is the nth element of sequence u. The second difference is u(n+2) + a u(n+1) + b u(n) = 0 can be converted to a difference equation (in this case, a second order linear difference equation): D2 u(n) + p D u(n) + q u(n) = 0 and vice versa. a, b, p, q are constants.
- diffraction pattern — the phenomenon exhibited by wave fronts that, passing the edge of an opaque body, are modulated, thereby causing a redistribution of energy within the front: it is detectable in light waves by the presence of a pattern of closely spaced dark and light bands (diffraction pattern) at the edge of a shadow.
- dig one's own grave — If you say that someone is digging their own grave, you are warning them that they are doing something foolish or dangerous that will cause their own failure.
- 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.
- dihydrostreptomycin — an antibiotic, C 21 H 41 N 7 O 12 , derived by organic synthesis from and believed to be less toxic than streptomycin: used in the form of its sulfate chiefly in the treatment of tuberculosis.
- dihydrotestosterone — (steroid) An androgenic metabolite of testosterone; used to treat certain breast cancers.
- 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.
- dimetric projection — a type of axonometric projection in which the object is shown with two of its three principal axes tilted equally from the plane of viewing
- 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