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20-letter words containing d, r, o, i

  • differential housing — the casing that houses the differential of a motor vehicle
  • dinitrogen tetroxide — a colourless gaseous substance that exists in equilibrium with nitrogen dioxide. As the temperature is reduced the proportion of the tetroxide increases. Formula: N2O4
  • diplomatic secretary — secretary (def 5).
  • diplomatic-secretary — secretary (def 5).
  • dirac delta function — delta function.
  • direct memory access — (architecture)   (DMA) A facility of some architectures which allows a peripheral to read and write memory without intervention by the CPU. DMA is a limited form of bus mastering.
  • 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.
  • 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
  • disproportionateness — The state or quality of being disproportionate or out of proportion.
  • distribution channel — trade: retailer
  • district court judge — a judge presiding over a lower court
  • district high school — a school in a rural area that includes primary and post-primary classes
  • district of columbia — a federal area in the E United States, on the Potomac, coextensive with the federal capital, Washington. 69 sq. mi. (179 sq. km). Abbreviation: DC (for use with zip code), D.C.
  • do someone a service — If you do someone a service, you do something that helps or benefits them.
  • doctor of philosophy — Also called doctorate. the highest degree awarded by a graduate school, usually to a person who has completed at least three years of graduate study and a dissertation approved by a board of professors.
  • documentary evidence — law: written
  • 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.
  • double-trailer truck — tandem trailer (def 1).
  • dressed to the nines — a cardinal number, eight plus one.
  • 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.
  • duck-billed dinosaur — hadrosaur.
  • 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.
  • economic determinism — the doctrine that all social, cultural, political, and intellectual forms are determined by or result from such economic factors as the quality of natural resources, productive capability, technological development, or the distribution of wealth.
  • education department — the department of a local authority that is concerned with education, or the government department concerned with education
  • electoral boundaries — the way that a country or area is divided for the purposes of voting in an election
  • electrocardiographic — Of or pertaining to an electrocardiogram (ECG) or electrocardiograph.
  • electrode efficiency — the ratio of the amount of metal deposited in an electrolytic cell to that theoretically deposited according to Faraday's laws
  • electrohydrodynamics — (physics) the study of the dynamics of electrically conducting fluid.
  • elementary education — the first six to eight years of a child's education
  • endorsement in blank — an endorsement on a bill of exchange, cheque, etc, naming no payee and thus making the endorsed sum payable to the bearer
  • equity of redemption — the right that a mortgager has in equity to redeem his property on payment of the sum owing, even though the sum is overdue
  • estrela mountain dog — a sturdy well-built dog of a Portuguese breed with a long thick coat and a thick tuft of hair round the neck, often used as a guard dog
  • european social fund — one of the four Structural Funds of the European Union which aims to support employment and the economic and social well-being of EU member countries
  • every bit as good as — You say that one thing is every bit as good, interesting, or important as another to emphasize that the first thing is just as good, interesting, or important as the second.
  • factor of production — any instrument, agent, etc., employed in the production of goods and services.
  • federal constitution — Constitution of the United States.
  • federation of malaya — a federation of the nine Malay States of the Malay Peninsula and two of the Straits Settlements (Malacca and Penang): formed in 1948: became part of the British Commonwealth in 1957 and joined Malaysia in 1963
  • field ion microscope — a device in which the atomic structure of the surface of a conductor is made visible by introducing helium gas into the device and applying a high voltage to ionize and accelerate the gas toward a fluorescent screen.
  • field-ion microscope — a device in which the atomic structure of the surface of a conductor is made visible by introducing helium gas into the device and applying a high voltage to ionize and accelerate the gas toward a fluorescent screen.
  • file descriptor leak — (programming)   (Or "fd leak" /F D leek/) A kind of programming bug analogous to a core leak, in which a program fails to close file descriptors ("fd"s) after file operations are completed, and thus eventually runs out of them. See leak.
  • first world problems — If you say that someone has First World problems, you mean that their problems are not really very important.
  • fission-track dating — the dating of samples of minerals by comparing the tracks in them by fission fragments of the uranium nuclei they contain, before and after irradiation by neutrons
  • fixed action pattern — a highly stereotyped pattern of behavior that is characteristic of a particular species.
  • fixed-price contract — a contract in which the price is preset and invariable, regardless of the actual costs of production.
  • flight data recorder — a recording device that records relevant data during an aircraft's flight
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