18-letter words containing o, v, i, f
- 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.
- angle of deviation — the angle between the direction of the refracted ray and the direction of the incident ray when a ray of light passes from one medium to another
- angle of elevation — elevation (def 8a).
- 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
- 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
- essence of violets — an alcoholic solution derived from violets, used as perfume
- fischer von erlach — Johann Bernhard [yaw-hahn bern-hahrt] /ˈyɔ hɑn ˈbɛrn hɑrt/ (Show IPA), 1656–1723, Austrian architect.
- fissure of sylvius — lateral fissure.
- 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 vicinity of — near to, in the area around
- inferior vena cava — See under vena cava.
- isidore of seville — Saint (Isidorus Hispalensis) a.d. c570–636, Spanish archbishop, historian, and encyclopedist.
- law of gravitation — a law stating that any two masses attract each other with a force equal to a constant (constant of gravitation) multiplied by the product of the two masses and divided by the square of the distance between them.
- lily of the valley — a plant, Convallaria majalis, having an elongated cluster of small, drooping, bell-shaped, fragrant white flowers.
- lives of the poets — a collection (1779–81), by Samuel Johnson, of biographical and critical essays on 52 English poets.
- 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).
- negative cash flow — the situation when income is less than payments
- 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.
- provably difficult — The set or property of problems for which it can be proven that no polynomial-time algorithm exists, only exponential-time algorithms.
- 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
- 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.
- specific viscosity — a measure of the resistance to flow of a fluid, expressed as the ratio of the absolute viscosity of the fluid to that of a reference fluid (usually water in the case of liquids)
- standard of living — a grade or level of subsistence and comfort in everyday life enjoyed by a community, class, or individual: The well-educated generally have a high standard of living.
- take a dim view of — not bright; obscure from lack of light or emitted light: a dim room; a dim flashlight.
- talk of the devil! — used when an absent person who has been the subject of conversation appears
On this page, we collect all 18-letter words with O-V-I-F. It’s easy to find right word with a certain length. It is the easiest way to find 18-letter word that contains in O-V-I-F to use in Scrabble or Crossword puzzles