18-letter words containing a, g, o
- echoencephalograph — a device that employs reflected ultrasonic waves to examine the position of brain structures.
- economic geography — a branch of geography that deals with the relation of physical and economic conditions to the production and utilization of raw materials and their manufacture into finished products.
- egg and spoon race — a novelty race in which contestants each carry an egg in a spoon to the finish line, the winner being the first to finish without dropping or breaking the egg.
- egg-and-spoon race — a race in which runners carry an egg balanced in a spoon
- eggshell porcelain — a type of very thin translucent porcelain originally made in China
- electoral register — An electoral register is an official list of all the people who have the right to vote in an election.
- electrocardiograms — Plural form of electrocardiogram.
- electrocardiograph — A machine used for electrocardiography.
- electrocorticogram — a record of brain waves obtained by placing electrodes directly on the surface of the exposed cerebral cortex
- electronic banking — the transfer of money between financial institutions through an exchange of electronic signals over a network
- electronic tagging — Electronic tagging is a system in which a criminal or suspected criminal has an electronic device attached to them which enables the police to know if they leave a particular area.
- electrophotography — Any of several methods of photocopying in which an image is created and then transferred between surfaces using static electricity.
- electroretinograms — Plural form of electroretinogram.
- endowment mortgage — an arrangement whereby a person takes out a mortgage and pays the capital repayment instalments into a life assurance policy and only the interest to the mortgagee during the term of the policy. The loan is repaid by the policy either when it matures or on the prior death of the policyholder
- engelbart, douglas — Douglas Engelbart
- environment agency — an official agency providing information on environmental issues, esp rivers, flooding and pollution
- equinoctial spring — either of the two highest spring tides that occur at the equinoxes
- ethnomusicological — Relating to or pertaining to ethnomusicology.
- ethnopsychological — Relating to ethnopsychology.
- euclid's algorithm — (algorithm) (Or "Euclidean Algorithm") An algorithm for finding the greatest common divisor (GCD) of two numbers. It relies on the identity gcd(a, b) = gcd(a-b, b) To find the GCD of two numbers by this algorithm, repeatedly replace the larger by subtracting the smaller from it until the two numbers are equal. E.g. 132, 168 -> 132, 36 -> 96, 36 -> 60, 36 -> 24, 36 -> 24, 12 -> 12, 12 so the GCD of 132 and 168 is 12. This algorithm requires only subtraction and comparison operations but can take a number of steps proportional to the difference between the initial numbers (e.g. gcd(1, 1001) will take 1000 steps).
- evolution strategy — (ES) A kind of evolutionary algorithm where individuals (potential solutions) are encoded by a set of real-valued "object variables" (the individual's "genome"). For each object variable an individual also has a "strategy variable" which determines the degree of mutation to be applied to the corresponding object variable. The strategy variables also mutate, allowing the rate of mutation of the object variables to vary. An ES is characterised by the population size, the number of offspring produced in each generation and whether the new population is selected from parents and offspring or only from the offspring. ES were invented in 1963 by Ingo Rechenberg, Hans-Paul Schwefel at the Technical University of Berlin (TUB) while searching for the optimal shapes of bodies in a flow.
- exchange programme — an arrangement in which people from different countries visit each other's country, perhaps to strengthen links between them or to improve foreign language skills
- exercise programme — a programme detailing a range of physical exercises and the amount of time each exercise should be performed, used especially in gymnasiums, where they are typically tailored to individuals' needs
- fall to the ground — (of a plan, theory, etc) to be rendered invalid, esp because of lack of necessary information
- fallot's tetralogy — a congenital heart disease in which there are four defects: pulmonary stenosis, enlarged right ventricle, a ventricular septal defect, and an aorta whose origin lies over the septal defect. In babies suffering this disease the defects can be corrected by surgery
- far eastern region — former name of Khabarovsk.
- farewell-to-spring — a slender, showy plant, Clarkia amoena, of the evening primrose family, native to western North America, having satiny, cup-shaped, lilac-crimson or reddish-pink flowers and roundish fruit.
- farm the long acre — to graze cows on the verge of a road
- fatty degeneration — deterioration of the cells of the body, accompanied by the formation of fat globules within the diseased cells.
- federal government — pertaining to or of the nature of a union of states under a central government distinct from the individual governments of the separate states, as in federal government; federal system.
- fibrocartilaginous — a type of cartilage having a large number of fibers.
- fight to the death — If you say that you will fight to the death for something, you are emphasizing that you will do anything to achieve or protect it, even if you suffer as a consequence.
- floating partition — a partition running parallel to and between two joists and resting on blocking between them.
- floating underflow — underflow
- floating-rate note — a eurobond, often issued as a negotiable bearer bond, that has a floating rate of interest
- flower arrangement — floral display
- for good (and all) — for always; finally; permanently
- fore-edge painting — a technique of painting a picture on the fore edge of a book, often in such a manner that only when the pages are slightly fanned the picture is revealed.
- foreign-trade zone — free port (def 1).
- forgive and forget — be reconciled
- forwarding address — address for mail to be sent on
- foundation garment — an undergarment, as a girdle or corset, worn by women to support or give shape to the contours of the body.
- foundling hospital — an institutional home for foundlings.
- fracture toughness — The fracture toughness of a material is how likely it is to resist fracture.
- fragile x syndrome — a widespread form of mental retardation caused by a faulty gene on the X chromosome.
- fragile-x syndrome — an inherited condition characterized by learning disability: affected individuals have an X-chromosome that is easily damaged under certain conditions
- fragmentation bomb — a bomb designed to break into many small, high-velocity fragments when detonated.
- frederick douglass — Frederick, 1817–95, U.S. ex-slave, abolitionist, and orator.
- free-range poultry — poultry kept in natural nonintensive conditions
- fringe-toed lizard — an iguanid lizard, Uma notata, of sandy deserts of the western U.S. and Mexico, having a wedge-shaped snout and toes fringed with long, pointed scales.