17-letter words containing r, s, f
- five-spice powder — a mixture of spices used especially in Chinese cooking, usually including cinnamon, cloves, fennel seed, pepper, and star anise.
- flash photography — photography using a momentary flash of artificial light as a source of illumination.
- flea in one's ear — a sharp rebuke
- flexible response — a military strategy that enables the response to an attack to be adapted to the nature and strength of the attack
- flickertail state — North Dakota (used as a nickname).
- flight instrument — any instrument used to indicate the altitude, attitude, airspeed, drift, or direction of an aircraft.
- flog a dead horse — a large, solid-hoofed, herbivorous quadruped, Equus caballus, domesticated since prehistoric times, bred in a number of varieties, and used for carrying or pulling loads, for riding, and for racing.
- floppy disk drive — disk drive
- florentine stitch — a straight stitch worked in a high and low relief pattern to form a variety of zigzag or oblique designs.
- flowers of sulfur — sublimed sulfur in the form of a fine yellow powder, used in medicine chiefly to kill parasites and fungi and to treat certain skin diseases.
- 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
- fluvioterrestrial — (of animals) able to live in rivers and on land
- footmen's gallery — the rearmost section of seats in the balcony of an English theater, especially in the late 17th and early 18th centuries.
- for heaven's sake — expressing frustration
- for the most part — a portion or division of a whole that is separate or distinct; piece, fragment, fraction, or section; constituent: the rear part of the house; to glue the two parts together.
- fore-and-aft sail — any of various sails, as jib-headed sails, gaff sails, lugsails, lateen sails, spritsails, staysails, and jibs, that do not set on yards and whose normal position, when not trimmed, is in a fore-and-aft direction amidships.
- foreign relations — (used with a singular verb) the field of foreign affairs: an expert in foreign relations.
- foreign secretary — foreign minister.
- forensic evidence — evidence obtained by the use of science, for example DNA evidence, etc
- forensic medicine — the application of medical knowledge to questions of civil and criminal law, especially in court proceedings.
- forest enterprise — a British government department responsible for maintaining and expanding forests
- forward contracts — Forward contracts are agreements to buy something in the future for a price that has been agreed today.
- 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-eyed opossum — a small opossum, Metachirops (Philander) opossum, ranging from Mexico to Brazil, having a white spot above each eye.
- four-letter words — any of a number of short words, usually of four letters, considered offensive or vulgar because of their reference to excrement or sex.
- four-star general — high-ranking military officer
- 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.
- fourfold purchase — a tackle that is composed of a rope passed through two fourfold blocks in such a way as to provide mechanical power in the ratio of 1 to 5 or 1 to 4, depending on whether hauling is done on the running or the standing block and without considering friction. Compare tackle (def 2).
- fourier transform — a mapping of a function, as a signal, that is defined in one domain, as space or time, into another domain, as wavelength or frequency, where the function is represented in terms of sines and cosines.
- 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].
- frames per second — (unit) (fps) The unit of measurement of the frame rate of a moving image.
- francis ferdinand — 1863–1914, archduke of Austria: heir apparent to the thrones of Austria and Hungary whose assassination precipitated the outbreak of World War I (nephew of Francis Joseph I).
- francis of assisi — Saint (Giovanni Francesco Bernardone) 1182?–1226, Italian friar: founder of the Franciscan order.
- francisco pizarro — Francisco [fran-sis-koh;; Spanish frahn-thees-kaw,, -sees-] /frænˈsɪs koʊ;; Spanish frɑnˈθis kɔ,, -ˈsis-/ (Show IPA), c1470–1541, Spanish conqueror of Peru.
- frankenstein food — any foodstuff that has been genetically modified
- fraternal society — a club or other association, usually of men, having a limited membership and devoted to professional, religious, charitable, or social activities.
- freedmen's bureau — an agency of the War Department set up in 1865 to assist freed slaves in obtaining relief, land, jobs, fair treatment, and education.
- freedom of speech — the right of people to express their opinions publicly without governmental interference, subject to the laws against libel, incitement to violence or rebellion, etc.
- freight insurance — insurance paid on goods in transport
- french somaliland — a former name of Djibouti (def 1).
- freund's adjuvant — a water-in-oil emulsion injected with immunogen (Freund's incomplete adjuvant) or with immunogen and killed mycobacteria (Freund's complete adjuvant) to enhance the immune response to the immunogen.
- from side to side — movement: back and forth
- from soup to nuts — a liquid food made by boiling or simmering meat, fish, or vegetables with various added ingredients.
- from the rooftops — If you shout something from the rooftops, you say it or announce it in a very public way.
- frostbite sailing — the sport of sailing in temperate latitudes during the winter despite cold weather.
- functional isomer — any of several structural isomers that have the same molecular formula but with the atoms connected in different ways and therefore falling into different functional groups.
- furbish lousewort — any plant belonging to the genus Pedicularis, of the figwort family, as the wood betony, formerly supposed to cause lice in sheep feeding on it: one species, P. furbishiae (Furbish lousewort) of parts of Maine and New Brunswick, Canada, having finely toothed leaves and a cluster of yellow flowers, is endangered and was thought to be extinct until specimens were discovered in 1946 and again in 1976.
- fuss and feathers — an excessively elaborate or pretentious display; ostentation.
- gamblers' fallacy — the fallacy that in a series of chance events the probability of one event occurring increases with the number of times another event has occurred in succession