17-letter words containing o, c, t, f
- double refraction — the separation of a ray of light into two unequally refracted, plane-polarized rays of orthogonal polarizations, occurring in crystals in which the velocity of light rays is not the same in all directions.
- droplet infection — infection spread by airborne droplets of secretions from the nose, throat, or lungs.
- electrofiltration — Electrofiltration is a separation process in which an electric field is applied across a filter to improve separation.
- electron affinity — a measure of the ability of an atom or molecule to form a negative ion, expressed as the energy released when an electron is attached
- electronic office — integrated computer systems designed to handle office work
- employment office — any of a number of government offices established to collect and supply to the unemployed information about job vacancies and to employers information about availability of prospective workers
- enforcement order — an order by a court to force a person or organization to comply with a regulation or law
- executive officer — the second-in-command of any of certain military units
- exfoliating cream — a granular cosmetic preparation that removes dead cells from the skin's surface
- explicit function — a function whose values may be computed directly, as y = x2 + 1
- facsimile catalog — a catalog that includes small reproductions of the items listed, as paintings, slides, designs, or the like.
- factory inspector — a person who inspects factories
- fairness doctrine — a policy mandated by the Federal Communications Commission, requiring radio and television stations to grant equal time to a political candidate, group, etc., to present an opposing viewpoint to one already aired.
- farming community — a community where farming is the main industry
- fellow countryman — sb of same nationality
- fendalton tractor — a four-wheel drive recreational vehicle
- fermentation lock — a valve placed on the top of bottles of fermenting wine to allow bubbles to escape
- ferroelectric ram — Ferroelectric Random Access Memory
- fictitious person — a legal entity or artificial person, as a corporation.
- field post office — a place to which mail intended for military units in the field is sent to be sorted and forwarded
- fifth commandment — “Honor thy father and thy mother, that thy days may be long upon the land which the Lord thy God giveth thee”: fifth of the Ten Commandments.
- fine-toothed comb — a comb with fine, closely set teeth
- fingertip control — control exercised through your fingertips, e.g. by touching a touchscreen
- first call on sth — If you have first call on something, you will be asked before anyone else whether you want to buy or use it.
- first commandment — “Thou shalt have no other gods before me”: first of the Ten Commandments.
- first performance — the first time that a play or concert is performed
- first-loss policy — an insurance policy for goods in which a total loss is extremely unlikely and the insurer agrees to provide cover for a sum less than the total value of the property
- first-order logic — (language, logic) The language describing the truth of mathematical formulas. Formulas describe properties of terms and have a truth value. The following are atomic formulas: True False p(t1,..tn) where t1,..,tn are terms and p is a predicate. If F1, F2 and F3 are formulas and v is a variable then the following are compound formulas: The "order" of a logic specifies what entities "For all" and "Exists" may quantify over. First-order logic can only quantify over sets of atomic propositions. (E.g. For all p . p => p). Second-order logic can quantify over functions on propositions, and higher-order logic can quantify over any type of entity. The sets over which quantifiers operate are usually implicit but can be deduced from well-formedness constraints. In first-order logic quantifiers always range over ALL the elements of the domain of discourse. By contrast, second-order logic allows one to quantify over subsets.
- fishnet stockings — leg coverings for women, made from an open mesh fabric resembling netting
- flagrante delicto — Law. in the very act of committing the offense.
- flight of capital — When people lose confidence in a particular economy or market and withdraw their investment from it, you can refer to a flight of capital from that economy or market.
- floating currency — a currency that is free to fluctuate against other currencies in accordance with market forces
- floating dry dock — a dock that floats and can be lowered in the water for the entrance of a ship, and then raised for use as a dry dock
- florentine stitch — a straight stitch worked in a high and low relief pattern to form a variety of zigzag or oblique designs.
- flowering currant — an ornamental shrub, Ribes sanguineum, growing to 2 to 3 metres (6 to 9ft) in height, with red, crimson, yellow, or white flowers: family Saxifragaceae
- flowering tobacco — any plant belonging to the genus Nicotiana, of the nightshade family, as N. alata and N. sylvestris, having clusters of fragrant flowers that usually bloom at night, grown as an ornamental.
- fluid lubrication — lubrication in which bearing surfaces are separated by an oil film sustained by the motion of the parts
- fluorescent light — a fluorescent lamp in domestic or commercial use; a fluorescent strip
- fluorescent strip — a fluorescent light in the form of a long strip
- foot-pound-second — of or relating to the system of units in which the foot, pound, and second are the principal units of length, mass, and time. Abbreviation: fps, f.p.s.
- forced convection — Forced convection is convection in which the movement of fluid does not happen naturally but is helped by a device such as a fan or pump.
- foreign secretary — foreign minister.
- fort walton beach — a city in NW Florida.
- forward contracts — Forward contracts are agreements to buy something in the future for a price that has been agreed today.
- foucault pendulum — a pendulum that demonstrates the rotation of the earth by exhibiting an apparent change in its plane of oscillation.
- foundation course — A foundation course is a course that you do at some colleges and universities in order to prepare yourself for a longer or more advanced course.
- four-stroke cycle — A four-stroke cycle is the cycle of engine operation which requires four strokes of the piston: for induction, compression, ignition, and exhaust.
- fractal dimension — (mathematics) A common type of fractal dimension is the Hausdorff-Besicovich Dimension, but there are several different ways of computing fractal dimension. Fractal dimension can be calculated by taking the limit of the quotient of the log change in object size and the log change in measurement scale, as the measurement scale approaches zero. The differences come in what is exactly meant by "object size" and what is meant by "measurement scale" and how to get an average number out of many different parts of a geometrical object. Fractal dimensions quantify the static *geometry* of an object. For example, consider a straight line. Now blow up the line by a factor of two. The line is now twice as long as before. Log 2 / Log 2 = 1, corresponding to dimension 1. Consider a square. Now blow up the square by a factor of two. The square is now 4 times as large as before (i.e. 4 original squares can be placed on the original square). Log 4 / log 2 = 2, corresponding to dimension 2 for the square. Consider a snowflake curve formed by repeatedly replacing ___ with _/\_, where each of the 4 new lines is 1/3 the length of the old line. Blowing up the snowflake curve by a factor of 3 results in a snowflake curve 4 times as large (one of the old snowflake curves can be placed on each of the 4 segments _/\_). Log 4 / log 3 = 1.261... Since the dimension 1.261 is larger than the dimension 1 of the lines making up the curve, the snowflake curve is a fractal. [sci.fractals FAQ].
- fractionalization — Separation into parts by fractionalizing.
- fraternal society — a club or other association, usually of men, having a limited membership and devoted to professional, religious, charitable, or social activities.