22-letter words containing a, d, r, o
- delaunay triangulation — (mathematics, graphics) (After B. Delaunay) For a set S of points in the Euclidean plane, the unique triangulation DT(S) of S such that no point in S is inside the circumcircle of any triangle in DT(S). DT(S) is the dual of the voronoi diagram of S.
- delayed-action shutter — a camera shutter that opens after an interval set by the photographer
- department of commerce — the department of the U.S. federal government that promotes and administers domestic and foreign commerce. Abbreviation: DOC.
- descriptive cataloging — the aspect of cataloging concerned with the bibliographic and physical description of a book, recording, or other work, accounting for such items as author or performer, title, edition, and imprint as opposed to subject content.
- developmental disorder — any condition, such as autism or dyslexia, that appears in childhood and is characterized by delay in the development of one or more psychological functions, such as language skill
- diachronic linguistics — historical linguistics.
- dicyclopentadienyliron — ferrocene (def 1).
- digital control system — (systems) (DCS) A digital computer used for real-time control of a dynamic system, usually in an industrial environment, possibly as part of a Supervisory Control and Data Acquisition (SCADA) system. A DCS samples feedback from the system under control and modifies the control signals in an attempt to achieve some desired behaviour. Analysis of such digital-analogue feedback systems can involve mathematical methods such as difference equations, Laplace transforms, z transfer functions, state space models and state transition matrices.
- digital radio mondiale — (communications) (DRM) A form of monaural digital broadcast using carrier frequencies below 30 MHz. DRM uses MPEG-4 AAC Main Profile and SBR at data rates of 16-25 kbps.
- digital video recorder — See DVR.
- dihydroxyphenylalanine — dopa.
- dilation and curettage — a surgical method for the removal of diseased tissue or an early embryo from the lining of the uterus by means of scraping.
- directional derivative — the limit, as a function of several variables moving along a given line from one specified point to another on the line, of the difference in the functional values at the two points divided by the distance between the points.
- directional microphone — a microphone that has a greater sensitivity to sounds coming from a particular area in front of it: used to eliminate unwanted sounds.
- director of admissions — a member of a university staff who is in overall charge of admissions to the university and its courses
- directory system agent — (DSA) The software that provides the X.500 Directory Service for a portion of the directory information base. Generally, each DSA is responsible for the directory information for a single organisation or organisational unit.
- disciplinary committee — a committee charged with examining alleged breaches of discipline within an organization, profession, etc and adjudicating on them
- dishonorable discharge — the discharge of a person from military service for an offense more serious than one for which a bad-conduct discharge is given.
- disposable soma theory — the theory that ageing is caused by the body having increasingly fewer resources to allocate towards repairing wear and damage to tissues
- distributed generation — A distributed generation system involves a person or company generating some of their power requirements in different ways, such as locally, or using renewable energy, in order to avoid taking it all from the grid.
- distributive education — a special program of vocational education at the high-school level in which a student is employed part-time, receiving on-the-job training, and also attends classes, most of which pertain directly to the student's vocational field.
- do a number on someone — to manipulate or trick someone
- do sth pursuant to sth — If someone does something pursuant to a law or regulation, they obey that law or regulation.
- dog's dinner/breakfast — You describe something as a dog's breakfast or dog's dinner in order to express your disapproval of it, for example because it is very untidy, badly organized, or badly done.
- dominant seventh chord — a chord consisting of the dominant and the major third, perfect fifth, and minor seventh above it. Its most natural resolution is to a chord on the tonic
- don't hold your breath — sth is unlikely to happen soon
- don't misunderstand me — You can say don't misunderstand me when you want to correct a wrong impression that you think someone may have got about what you are saying.
- drumhead court-martial — a court-martial held, usually on a battlefield, for the summary trial of charges of offenses committed during military operations.
- earn one's daily bread — to earn one's living
- earth inductor compass — a compass actuated by induction from the earth's magnetic field.
- economy-class syndrome — Economy-class syndrome is a serious medical condition caused by blood clots in the legs moving up to the lungs; used especially in connection with long-haul flights.
- emergency road service — a form of motoring insurance that sends assistance to drivers when their vehicles break down on a journey; it is provided either by the national or regional automobile association or by a private insurance company
- end transmission block — (character) (ETB) The mnemonic for ASCII character 23.
- endotrophic mycorrhiza — the most widespread and common type of mycorrhiza, in which the fungus lives within the cells of the roots of the plant
- enhanced parallel port — (hardware) (EPP) A parallel port that confirms to the IEEE's EPP standard. An EPP is actually an expansion bus that can handle 64 disk drives and other peripherals.
- every now and then etc — You use every in the expressions every now and then, every now and again, every once in a while, and every so often in order to indicate that something happens occasionally.
- experimental condition — one of the distinct states of affairs or values of the independent variable for which the dependent variable is measured in order to carry out statistical tests or calculations
- far-infrared radiation — the longer wavelengths of electromagnetic radiation in the infrared region of the spectrum, beyond the red end of the visible spectrum, from 50 to 1000 micrometers. Abbreviation: FIR.
- federal crop insurance — insurance against the failure of certain crops provided to farmers and producers by the Federal Government
- federal district court — district court (def 2).
- federal maritime board — the body responsible for regulating commerce by US and international shipping in US waters
- ferdinand von zeppelin — Count Ferdinand von [fer-di-nahnt fuh n] /ˈfɛr dɪˌnɑnt fən/ (Show IPA), 1838–1917, German general and aeronaut: designer and manufacturer of the zeppelin.
- fetal alcohol syndrome — a pattern of birth defects caused by maternal consumption of alcohol during pregnancy: considered as one of the fetal alcohol spectrum disorders. Abbreviation: FAS.
- fitzgerald contraction — the hypothesis that a moving body exhibits a contraction in the direction of motion when its velocity is close to the speed of light.
- fixed point combinator — (mathematics) (Y) The name used in combinatory logic for the fixed point function, also written as "fix".
- forced place insurance — Forced place insurance is insurance taken out by a bank or creditor on an uninsured debtor's behalf on a property that is being used as collateral.
- forth modification lab — (event) (FORML) A Forth conference held every November on the West coast of the USA ().
- four-hundred-day clock — a clock that needs to be wound once a year, having the works exposed under a glass dome and utilizing a torsion pendulum.
- free and common socage — Medieval History. land held by a tenant who rendered certain honorable and nonservile duties to his lord.
- gallamine triethiodide — a neuromuscular blocking drug, C 30 H 60 I 3 N 3 O 3 , similar to curare, used as a skeletal muscle relaxant in conjunction with surgical anesthesia.