18-letter words containing f, e, v, r, i
- affective disorder — any mental disorder, such as depression or mania, that is characterized by abnormal disturbances of mood
- affirmative action — Affirmative action is the policy of giving jobs and other opportunities to members of groups such as racial minorities or women who might not otherwise have them.
- 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.
- axis of revolution — an axis in a plane, about which an area is revolved to form a solid of revolution.
- biodiversification — the process by which the diversity of plants or animals develops or is increased within a particular region or group of organisms.
- bird's-foot violet — a North American violet (Viola pedata) having divided leaves and large blue or purple flowers
- check verification — Check verification is a system that checks national databases of information about individuals to make sure that checks will be honored and fraud is not being committed.
- congress of vienna — the European conference held at Vienna from 1814–15 to settle the territorial problems left by the Napoleonic Wars
- 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.
- curvature of field — a monochromatic aberration of a lens or other optical system in which the focal surface is curved, the refracted image of an object oriented perpendicular to the axis of the lens lying on a curved surface rather than in a plane perpendicular to the axis.
- deliver oneself of — to speak with deliberation or at length
- financial services — A company or organization that provides financial services is able to help you do things such as make investments or buy a pension or mortgage.
- fischer von erlach — Johann Bernhard [yaw-hahn bern-hahrt] /ˈyɔ hɑn ˈbɛrn hɑrt/ (Show IPA), 1656–1723, Austrian architect.
- fissure of sylvius — lateral fissure.
- five hundred rummy — a variety of rummy in which the winner is the first player to score 500 points.
- forced perspective — the use of objects or images that are larger or smaller than they should be, to suggest that they are nearer or further away than they really are
- foreign investment — investment from foreign countries
- forgive and forget — be reconciled
- formal equivalence — the relation that holds between two open sentences when their universal closures are materially equivalent
- give a person five — to greet or congratulate someone by slapping raised hands
- government deficit — A government deficit is a situation in which a government spends more money than it has.
- haemorrhagic fever — any of a group of fevers, such as Ebola virus disease and yellow fever, characterized by internal bleeding or bleeding into the skin
- half-open interval — a set of numbers between two given numbers but including only one endpoint.
- in the affirmative — positively, by saying yes
- inferior vena cava — See under vena cava.
- intermittent fever — a malarial fever in which feverish periods lasting a few hours alternate with periods in which the temperature is normal.
- isidore of seville — Saint (Isidorus Hispalensis) a.d. c570–636, Spanish archbishop, historian, and encyclopedist.
- lifesaving service — a private organization or government agency for general marine rescue operations.
- margaret of valois — ("Queen Margot") 1533–1615, 1st wife of Henry IV of France: queen of Navarre; patron of science and literature (daughter of Henry II of France and Catherine de' Medici).
- merchant of venice — a comedy (1596?) by Shakespeare.
- myeloproliferative — (medicine) of or pertaining to the presence of an abnormal proliferation of myelopoietic cells (from bone marrow).
- non-self-governing — governed by itself or having self-government, as a state or community; independent.
- offensive material — any published or broadcast content (such as articles, photographs, films, or websites) that is likely to be upsetting, insulting, or objectionable to some or most people
- overdraft facility — a facility (of a bank or building-society cheque account) that allows a withdrawal of money in excess of the account's credit balance
- overdraft interest — interest charged on money withdrawn in excess of the credit balance of a bank or building society account
- overidentification — an act or instance of identifying; the state of being identified.
- quality of service — (communications, networking) (QoS) The performance properties of a network service, possibly including throughput, transit delay, priority. Some protocols allow packets or streams to include QoS requirements.
- rabbit-foot clover — a plant, Trifolium arvense, having trifoliate leaves with narrow leaflets and fuzzy, cylindrical, grayish-pink flower heads.
- raffinate recovery — Raffinate recovery is the use of a substance which is left after a process is complete and the desired substances have been removed.
- recursive function — a function defined in terms of the repeated application of a number of simpler functions to their own values, by specifying a base clause and a recursion formula
- relative frequency — the ratio of the number of times an event occurs to the number of occasions on which it might occur in the same period.
- self-advertisement — a paid announcement, as of goods for sale, in newspapers or magazines, on radio or television, etc.
- silver certificate — a former paper currency first issued in 1878 by the U.S. federal government for circulation, equal to and redeemable for silver to a stated value.
- silvery cinquefoil — any of several plants belonging to the genus Potentilla, of the rose family, having yellow, red, or white five-petaled flowers, as P. reptans (creeping cinquefoil) of the Old World, or P. argentea (silvery cinquefoil) of North America.
- the french riviera — the Mediterranean coastal region of France from Cannes eastward to Italy
- to play favourites — to display favouritism
- ultraviolet filter — a filter used on a lens to absorb ultraviolet radiation that may impart an undesirable blue cast to a photograph.
- universal suffrage — suffrage for all persons over a certain age, usually 18 or 21, who in other respects satisfy the requirements established by law.
- university faculty — a division within a university comprising one subject area, or a number of related subject areas
- vermiform appendix — a narrow, blind tube protruding from the cecum, having no known useful function, in humans being 3 to 4 inches (8 to 10 cm) long and situated in the lower right-hand part of the abdomen.
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