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18-letter words containing f, e, r, o, c

  • 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.
  • cooling-off period — A cooling-off period is an agreed period of time during which two sides with opposing views try to resolve a dispute before taking any serious action.
  • corps of engineers — a branch of the U.S. Army responsible for military and many civil engineering projects.
  • corridors of power — the higher echelons of government, the Civil Service, etc, considered as the location of power and influence
  • counterreformation — a reform movement to oppose a previous one
  • court of exchequer — (formerly) an English civil court where Crown revenue cases were tried
  • court of st. james — the British royal court
  • creme de framboise — a liqueur flavored with raspberries.
  • crocodile-infested — full of crocodiles
  • crude oil fraction — A crude oil fraction is a component of crude oil, which has its own particular molecular composition, weight, and boiling point.
  • 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.
  • curvature of space — (in relativity) a property of space near massive bodies in which their gravitational field causes light to travel along curved paths.
  • dead-letter office — an office where undeliverable letters were taken for storage
  • declaration of war — a formal statement made by one country to another that a state of war now exists between them
  • defense calculator — IBM 701
  • democratic deficit — any situation in which there is believed to be a lack of democratic accountability and control over the decision-making process
  • diaminofluorescein — (organic compound) A fluorescein into which two amino groups have been substituted.
  • due process of law — the administration of justice in accordance with established rules and principles
  • efficient frontier — The efficient frontier is a method of analyzing a portfolio to discover the combination of assets that will produce the most return for risk.
  • eleanor of castile — 1246–90, Spanish wife of Edward I of England. Eleanor Crosses were erected at each place at which her body rested between Nottingham, where she died, and London, where she is buried
  • electronic warfare — the military use of electronics to prevent or reduce an enemy's effective use and to protect friendly use of electromagnetic radiation equipment
  • enforcement action — action by a body or organization, esp a financial one, to make sure that its rules are being followed
  • excess profits tax — a tax on profits exceeding a certain amount
  • fabric conditioner — a product used when washing clothes to make them feel softer
  • farm the long acre — to graze cows on the verge of a road
  • fettuccine alfredo — fettuccine in cream sauce with grated Parmesan cheese.
  • fifth monarchy men — (during the Commonwealth in the 17th century) a militant sect of Puritans who identified the fifth monarchy with the millennial reign of Christ and who believed they should help to inaugurate that reign by force.
  • file control block — (operating system)   (FCB) An MS-DOS data structure that stores information about an open file. The number of FCBs is configured in CONFIG.SYS with a command FCBS=x,y where x (between 1 and 255 inclusive, default 4) specifies the number of file control blocks to allocate and therefore the number of files that MS-DOS can have open at one time. y (not needed from DOS 5.0 onward) specifies the number of files to be closed automatically if all x are in use.
  • firecracker flower — a plant, Dichelostemma ida-maia, of the amaryllis family, native to California and Oregon, having clusters of tubular scarlet flowers.
  • first class module — (programming)   A module that is a first class data object of the programming language, e.g. a record containing functions. In a functional language, it is standard to have first class programs, so program building blocks can have the same status.
  • fischer von erlach — Johann Bernhard [yaw-hahn bern-hahrt] /ˈyɔ hɑn ˈbɛrn hɑrt/ (Show IPA), 1656–1723, Austrian architect.
  • fitness instructor — physical trainer, exercise teacher
  • fixed-focus camera — a camera with an unadjustable focal length and with a relatively large depth of field.
  • fixed-radio access — Wireless Local Loop
  • fluorescent screen — a transparent screen coated on one side with a phosphor that fluoresces when exposed to X-rays or cathode rays
  • fluorodeoxyglucose — (carbohydrate) A fluorine analog of glucose that is used in positron emission tomography.
  • forced development — the processing of underexposed photographic film to increase the image density
  • 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
  • forensic chemistry — the application of facts concerning chemistry to questions of civil and criminal law.
  • forensic scientist — science expert: provides evidence
  • formal equivalence — the relation that holds between two open sentences when their universal closures are materially equivalent
  • forward compatible — forward compatibility
  • four-color problem — the problem, solved in 1976, of proving the theorem that any geographic map can be colored using only four colors so that no connected countries with a common boundary are colored the same color.
  • fourth commandment — “Remember the sabbath day, to keep it holy”: fourth of the Ten Commandments.
  • fracture toughness — The fracture toughness of a material is how likely it is to resist fracture.
  • frame of reference — a structure of concepts, values, customs, views, etc., by means of which an individual or group perceives or evaluates data, communicates ideas, and regulates behavior.
  • frederick douglass — Frederick, 1817–95, U.S. ex-slave, abolitionist, and orator.
  • frequency function — probability density function (def 2).
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