22-letter words containing a, e, r, o
- 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
- 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.
- east african community — an association established in 1967 by Kenya, Uganda, and Tanzania to promote closer economic and social ties between member states: dissolved in 1977, but reformed in 1999, and joined in 2007 by Burundi and Rwanda
- 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.
- ectotrophic mycorrhiza — a type of mycorrhiza, typical of temperate and Boreal trees, in which the fungus forms a layer on the outside of the roots of the plant
- electroencephalographs — Plural form of electroencephalograph.
- electroencephalography — The measurement of electrical activity in different parts of the brain and the recording of such activity as a visual trace (on paper or on an oscilloscope screen).
- electrolytic capacitor — An electrolytic capacitor is an electrical capacitor with an electrolyte between the two plates.
- electromagnetic moment — a measure of the magnetic strength of a magnet or current-carrying coil, expressed as the torque produced when the magnet or coil is set with its axis perpendicular to unit magnetic flux density. It is measured in ampere metres squared
- electronic mail client — mail user agent
- electrophysiologically — In an electrophysiological way.
- electrothermal printer — a printer that produces characters by burning the image on specially coated paper
- 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
- employers' association — a body of employers, usually from the same sector of the economy, associated to further the interests of member companies by conducting negotiations with trade unions, providing advice, making representations to other bodies, etc
- 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
- engineering consultant — a consultant specializing in engineering
- english cocker spaniel — any of a breed of small spaniel, similar to and the progenitor of the cocker spaniel
- 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.
- european economic area — a free-trade area created in 1994 by an agreement between the European Free Trade Association (EFTA), excluding Switzerland, and the European Union (EU)
- 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.
- evolutionary algorithm — (EA) An algorithm which incorporates aspects of natural selection or survival of the fittest. An evolutionary algorithm maintains a population of structures (usually randomly generated initially), that evolves according to rules of selection, recombination, mutation and survival, referred to as genetic operators. A shared "environment" determines the fitness or performance of each individual in the population. The fittest individuals are more likely to be selected for reproduction (retention or duplication), while recombination and mutation modify those individuals, yielding potentially superior ones. EAs are one kind of evolutionary computation and differ from genetic algorithms. A GA generates each individual from some encoded form known as a "chromosome" and it is these which are combined or mutated to breed new individuals. EAs are useful for optimisation when other techniques such as gradient descent or direct, analytical discovery are not possible. Combinatoric and real-valued function optimisation in which the optimisation surface or fitness landscape is "rugged", possessing many locally optimal solutions, are well suited for evolutionary algorithms.
- 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
- facsimile transmission — an international system of transmitting a written, printed, or pictorial document over the telephone system by scanning it photoelectrically and reproducing the image after transmission
- fall prey to something — To fall prey to something bad means to be taken over or affected by it.
- 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.
- fast fourier transform — (algorithm) (FFT) An algorithm for computing the Fourier transform of a set of discrete data values. Given a finite set of data points, for example a periodic sampling taken from a real-world signal, the FFT expresses the data in terms of its component frequencies. It also solves the essentially identical inverse problem of reconstructing a signal from the frequency data. The FFT is a mainstay of numerical analysis. Gilbert Strang described it as "the most important algorithm of our generation". The FFT also provides the asymptotically fastest known algorithm for multiplying two polynomials. Versions of the algorithm (in C and Fortran) can be found on-line from the GAMS server here.
- 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.
- fifth earl of rosebery — Archibald Philip Primrose [prim-rohz] /ˈprɪmˌroʊz/ (Show IPA), 5th Earl of, 1847–1929, British statesman and author: prime minister 1894–95.
- file transfer protocol — (FTP) A client-server protocol which allows a user on one computer to transfer files to and from another computer over a TCP/IP network. Also the client program the user executes to transfer files. It is defined in STD 9, RFC 959. See also anonymous FTP, FSP, TFTP.