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19-letter words containing o, d, n

  • 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
  • depletion allowance — a tax allowance granted in certain industries, such as the oil and gas industries, to compensate for the depletion of the oil, gas, etc owned by the company
  • dereliction of duty — Dereliction of duty is deliberate or accidental failure to do what you should do as part of your job.
  • detective constable — a police officer who investigates crime and who is of the lowest rank
  • detective inspector — a police officer who investigates crime and who ranks above a detective sergeant but below a detective chief inspector
  • development company — a company that buys land and builds houses, offices, shops, or factories on it, or buys existing buildings and makes them more modern
  • 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.
  • diamond-point spoon — a spoon having a handle terminating in a polygonal, pointed knob.
  • 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.
  • diethylaminoethanol — a colorless, hygroscopic, water-soluble liquid, C 6 H 15 NO, used for the synthesis of local anesthetics, in antirust compounds, and in photographic emulsions.
  • 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 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.
  • 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
  • diplomatic immunity — exemption from taxation, searches, arrest, etc., enjoyed by diplomatic officials and their dependent families under international law, and usually on a reciprocal basis.
  • 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
  • direct-vision prism — Amici prism.
  • direction indicator — aerial used in wireless communication
  • directional coupler — (communications)   (tap) A passive device used in cable systems to divide and combine radio frequency signals. A directional coupler has at least three ports: line in, line out, and the tap. The signal passes between line in and line out ports with loss referred to as the insertion loss. A small portion of the signal power applied to the line in port passes to the tap port. A signal applied to the tap port is passed to the line in port less the tap attenuation value. The tap signals are isolated from the line out port to prevent reflections. A signal applied to the line out port passes to the line in port and is isolated from the tap port. Some devices provide more than one tap output line (multi-taps).
  • directory enquiries — Directory enquiries is a service which you can telephone to find out someone's telephone number.
  • 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
  • disciplinary action — punishment or caution
  • discretionary trust — a trust in which the beneficiaries' shares are not fixed in the trust deed but are left to the discretion of other persons, often the trustees
  • discriminated union — (theory)   The discriminated union of two sets A and B is A + B = {(inA, a) | a in A} U {(inB, b)| b in B} where inA and inB are arbitrary tags which specify which summand an element originates from. A type (especially an algebraic data type) might be described as a discriminated union if it is a sum type whose objects consist of a tag to say which part of the union they belong to and a value of the corresponding type.
  • discussion document — a document that puts forward some ideas or opinions that might form the basis of a discussion of a particular topic
  • disjunctive pronoun — an inflection of pronouns in some languages that is used alone or after a preposition, such as moi in French
  • dispersion relation — the relationship between the angular frequency (ω;) of a wave and the magnitude of its wave vector (k). Thus the wave's speed is ω/k
  • distillation column — a type of still fitted with interior baffles, used for fractional distillation. Compare still2 (def 1).
  • distribution system — The distribution system is the part of an electric system after the transmission system that is dedicated to delivering electric energy to an end user.
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