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20-letter words containing a, n, d

  • dictionary catalogue — a catalogue of the authors, titles, and subjects of books in one alphabetical sequence
  • diels-alder reaction — the reaction in which a conjugated diene combines with a double or triple bond of a given compound to form a ring of six carbon atoms.
  • difference amplifier — A difference amplifier is a device that amplifies the difference between two inputs, rejecting any signals common to both.
  • differential housing — the casing that houses the differential of a motor vehicle
  • differential pricing — a situation in which different prices are charged for the same product or service
  • digital service unit — data service unit
  • dimensional analysis — a method for comparing the dimensions of the physical quantities occurring in a problem to find relationships between the quantities without having to solve the problem completely. Compare dimension (def 6).
  • dimethylanthranilate — a colorless or pale-yellow liquid, C 9 H 11 NO 2 , having a grape odor: used chiefly in perfumes, flavorings, and drugs.
  • diophantine analysis — any of several methods for finding integral solutions for equations with more than one variable whose coefficients are integers.
  • diophantine equation — an equation involving more than one variable in which the coefficients of the variables are integers and for which integral solutions are sought.
  • dirac delta function — delta function.
  • directional drilling — a method of drilling for oil in which the well is not drilled vertically, as when a number of wells are to be drilled from a single platform to reach different areas of an oil field
  • directory assistance — a telephone company service that furnishes telephone directory information over the telephone.
  • directory user agent — (DUA) The software that accesses the X.500 Directory Service on behalf of the directory user. The directory user may be a person or another software element.
  • disability allowance — an amount of money paid by the government to people who are unable to work because of a disability. This is a general term or, in the UK, a shorter way of referring to what is officially called the Disability Living Allowance
  • disability insurance — insurance providing income to a policyholder who is disabled and cannot work.
  • disciplinary hearing — a hearing at which the conduct of a member of an organization, profession etc is examined and a punishment may be handed down
  • discounted cash flow — a technique for appraising an investment that takes into account the different values of future returns according to when they will be received
  • discretionary income — money for luxuries
  • diskless workstation — (computer, networking)   A personal computer or workstation which has neither a hard disk nor floppy disk drive and which performs all file access via a local area network connection to a file server. The lowest level bootstrap code is stored in non-volatile storage. This uses a simple protocol such as BOOTP to request and download more sophisticated boot code and eventually, the operating system. The archtypal product was the 3Station developed by Bob Metcalfe at 3Com. Another example was the Sun 3/50. Diskless workstations are ideal when many users are running the same application. They are small, quiet, more reliable than products with disks, and help prevent both the theft of data and the introduction of viruses since the software and data available on them is controlled by the network administrator or system administrator. They do however rely on a server which becomes a disadvantage if it is heavily loaded or down. See also breath-of-life packet.
  • dispersion hardening — the strengthening of an alloy as a result of the presence of fine particles in the lattice
  • displacement current — the rate of change, at any point in space, of electric displacement with time.
  • displacement tonnage — the number of long tons of water displaced by a vessel, light or load displacement being specified.
  • disproportionateness — The state or quality of being disproportionate or out of proportion.
  • distress merchandise — goods sold below the prevailing price in order to raise cash quickly or to meet some other financial emergency.
  • distribution channel — trade: retailer
  • do someone a service — If you do someone a service, you do something that helps or benefits them.
  • docosahexaenoic acid — DHA.
  • documentary evidence — law: written
  • dolly varden pattern — a fabric print consisting of bouquets of flowers.
  • domestic heating oil — a liquid petroleum product used to fuel residential building furnaces or boilers
  • double fertilization — the fertilization process characteristic of flowering plants, in which one sperm cell of a pollen grain fertilizes an egg cell while a second fuses with two polar nuclei to produce a triploid body that gives rise to the endosperm.
  • draw close/draw near — If an event or period of time is drawing closer or is drawing nearer, it is approaching.
  • drive a hard bargain — be tough negotiator
  • drum and bugle corps — a marching band of drum players and buglers.
  • drunk and disorderly — If someone is charged with being drunk and disorderly, they are charged with being drunk and behaving in a noisy, offensive, or violent way in public.
  • dual in-line package — (hardware)   (DIL, DIP) The most common type of package for small and medium scale integrated circuits, with up to about 48 pins. The pins hang vertically from the two long edges of the rectangular package, spaced at intervals of 0.1 inch. The pins fit through holes in the circuit board to which they are soldered or into a socket.
  • duck-billed dinosaur — hadrosaur.
  • dun & bradstreet — an agency furnishing subscribers with information as to the financial standing and credit rating of businesses
  • dynamic data linking — Dynamic Data Exchange
  • dynamic link library — Dynamically Linked Library
  • early modern english — the English language represented in printed documents of the period starting with Caxton (1476) and ending with Dryden (1700).
  • early sunday morning — a painting (1930) by Edward Hopper.
  • eat out of sb's hand — If you have someone eating out of your hand, they are completely under your control.
  • education department — the department of a local authority that is concerned with education, or the government department concerned with education
  • educational quotient — a numerical measure of an educational system's effectiveness, based on standardized test scores, graduation rate, and other factors.
  • edward the confessor — Saint, 1002?–66, English king 1042–66: founder of Westminster Abbey.
  • electoral boundaries — the way that a country or area is divided for the purposes of voting in an election
  • electrohydrodynamics — (physics) the study of the dynamics of electrically conducting fluid.
  • elementary education — the first six to eight years of a child's education
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