18-letter words containing u, n, f, r
- african lion hound — one of a South African breed of medium-sized muscular hunting dogs having a short, glossy, red or tan coat, with a characteristic ridge of hair along the spine consisting of parallel crowns of hair growing in the opposite direction of the rest of the coat, originally developed for hunting lions but now used primarily as a guard dog.
- african tulip tree — a tropical African evergreen tree, Spathodea campaulata, with pinnate leaves, split pods, winged seeds, and large red flowers.
- algebraic function — any function which can be constructed in a finite number of steps from the elementary operations and the inverses of any function already constructed
- antivirus software — (tool) Programs to detect and remove computer viruses. The simplest kind scans executable files and boot blocks for a list of known viruses. Others are constantly active, attempting to detect the actions of general classes of viruses. antivirus software should always include a regular update service allowing it to keep up with the latest viruses as they are released.
- army of occupation — an army that goes into a defeated country to enforce peace terms, keep order, etc.
- arrest of judgment — a stay of proceedings after a verdict, on the grounds of error or possible error
- arsenic trisulfide — a yellow or red crystalline substance, As 2 S 3 , occurring in nature as the mineral orpiment, and used as a pigment (king's yellow) and in pyrotechnics.
- assumption of risk — Assumption of risk is the practice of paying for minor losses yourself, but protecting against catastrophic losses by buying insurance cover.
- at your fingertips — If you say that something is at your fingertips, you approve of the fact that you can reach it easily or that it is easily available to you.
- attendance figures — the number of people present at events such as football matches or concerts
- audio conferencing — the practice of conducting meetings by the use of audio telecommunications
- axis of revolution — an axis in a plane, about which an area is revolved to form a solid of revolution.
- backus normal form — Backus-Naur Form
- battle of omdurman — a battle (1898) in which the Mahdi's successor and his Ansar followers were defeated by Lord Kitchener's British forces
- be sure of oneself — If you are sure of yourself, you are very confident about your own abilities or opinions.
- before you know it — rapidly, soon
- bird's-nest fungus — any fungus of the family Nidulariaceae, having a nestlike spore-producing body containing egglike spore-filled structures
- blackback flounder — any of various popular food flatfishes, as Parophrys vetulus of the Pacific (English sole) and Pseudopleuronectes americanus of the Atlantic (winter flounder or blackback flounder)
- blissful ignorance — unawareness or inexperience of something unpleasant
- board of education — a group or agency with responsibility for education
- bounty-fed farmers — farmers who benefit from subsidies
- burn one's fingers — to suffer from having meddled or been rash
- california current — a cold current originating in the northern part of the Pacific Ocean, flowing SE along the coast of W North America.
- california fuchsia — a North American onagraceous plant, Zauschneria californica, with tubular scarlet flowers
- california-fuchsia — a plant belonging to the genus Fuchsia, of the evening primrose family, including many varieties cultivated for their handsome drooping flowers.
- campaign furniture — furniture, as chests or desks, having metal hinges on the corners and handles on the sides.
- cartilaginous fish — any fish of the class Chondrichthyes, including the sharks, skates, and rays, having a skeleton composed entirely of cartilage
- cash-for-questions — of, involved in, or relating to a scandal in which some MPs were accused of accepting bribes to ask particular questions in Parliament
- cauliflower fungus — a large edible white to yellowish cauliflowerlike mushroom, Sparassis radicata, widely distributed in North America.
- centre of pressure — the point in a body at which the resultant pressure acts when the body is immersed in a fluid
- centrifugal clutch — an automatic clutch in which the friction surfaces are engaged by weighted levers acting under centrifugal force at a certain speed of rotation
- chlorofluorocarbon — Chlorofluorocarbons are the same as CFCs.
- church of scotland — the established church in Scotland, Calvinist in doctrine and Presbyterian in constitution
- combustion furnace — a furnace used in the laboratory to carry out elemental analysis of organic compounds
- configuration item — (jargon) Hardware or software, or an aggregate of both, which is designated by the project configuration manager (or contracting agency) for configuration management.
- considered harmful — (programming, humour) A type of phrase based on the title of Edsger W. Dijkstra's famous note in the March 1968 Communications of the ACM, "Goto Statement Considered Harmful", which fired the first salvo in the structured programming wars. Amusingly, the ACM considered the resulting acrimony sufficiently harmful that it will (by policy) no longer print articles taking so assertive a position against a coding practice. In the ensuing decades, a large number of both serious papers and parodies bore titles of the form "X considered Y". The structured-programming wars eventually blew over with the realisation that both sides were wrong, but use of such titles has remained as a persistent minor in-joke.
- constructive proof — (mathematics) A proof that something exists that provides an example or a method for actually constructing it. For example, for any pair of finite real numbers n < 0 and p > 0, there exists a real number 0 < k < 1 such that f(k) = (1-k)*n + k*p = 0. A constructive proof would proceed by rearranging the above to derive an equation for k: k = 1/(1-n/p) From this and the constraints on n and p, we can show that 0 < k < 1. A few mathematicians actually reject *all* non-constructive arguments as invalid; this means, for instance, that the law of the excluded middle (either P or not-P must hold, whatever P is) has to go; this makes proof by contradiction invalid. See intuitionistic logic. Constructive proofs are popular in theoretical computer science, both because computer scientists are less given to abstraction than mathematicians and because intuitionistic logic turns out to be an appropriate theoretical treatment of the foundations of computer science.
- continued fraction — a number plus a fraction whose denominator contains a number and a fraction whose denominator contains a number and a fraction, and so on
- contract furniture — furniture designed and manufactured for commercial installation, as in offices, waiting rooms, or lobbies.
- counterreformation — a reform movement to oppose a previous one
- creeping featurism — (jargon) /kree'ping fee'chr-izm/ (Or "feature creep") A systematic tendency to load more chrome and features onto systems at the expense of whatever elegance they may have possessed when originally designed. "The main problem with BSD Unix has always been creeping featurism." More generally, creeping featurism is the tendency for anything to become more complicated because people keep saying "Gee, it would be even better if it had this feature too". The result is usually a patchwork because it grew one ad-hoc step at a time, rather than being planned. Planning is a lot of work, but it's easy to add just one extra little feature to help someone, and then another, and another, .... When creeping featurism gets out of hand, it's like a cancer. Usually this term is used to describe computer programs, but it could also be said of the federal government, the IRS 1040 form, and new cars. A similar phenomenon sometimes afflicts conscious redesigns; see second-system effect. See also creeping elegance.
- crude oil fraction — A crude oil fraction is a component of crude oil, which has its own particular molecular composition, weight, and boiling point.
- cultural diffusion — act of diffusing; state of being diffused.
- current efficiency — the ratio of the actual mass of a substance liberated from an electrolyte by the passage of current to the theoretical mass liberated according to Faraday's law
- dangerous offender — an offender who is deemed by a court of law to be likely to engage in further violent conduct, and who thus becomes eligible for an indefinite prison sentence
- defense calculator — IBM 701
- diaminofluorescein — (organic compound) A fluorescein into which two amino groups have been substituted.
- distress frequency — a radio frequency band reserved for emergency signals from aircraft or ships in distress.
- division of labour — a system of organizing the manufacture of an article in a series of separate specialized operations, each of which is carried out by a different worker or group of workers
- duty-free shopping — the making of duty-free purchases
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