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18-letter words containing u, f, o

  • 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.
  • quarry-tiled floor — a floor covered with square or diamond-shaped unglazed floor tiles
  • quick off the mark — If you are quick off the mark, you are quick to understand or respond to something. If you are slow off the mark, you are slow to understand or respond to something.
  • radius of gyration — the distance from an axis at which the mass of a body may be assumed to be concentrated and at which the moment of inertia will be equal to the moment of inertia of the actual mass about the axis, equal to the square root of the quotient of the moment of inertia and the mass.
  • recruiting officer — a person whose job is to recruit staff, esp on behalf of the military
  • 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
  • reference counting — (programming)   A garbage collection technique where each memory cell contains a count of the number of other cells which point to it. If this count reaches zero the cell is freed and its pointers to other cells are followed to decrement their counts, and so on recursively. This technique cannot cope with circular data structures. Cells in such structures refer (indirectly) to themselves and so will never have a zero reference count. This means they would never be reclaimed, even when there are no references from outside the structure.
  • reproduction proof — repro proof.
  • return to the fold — come back home
  • return-flue boiler — a fire-tube boiler having flues that collect the combustion gases at the end of the boiler opposite the fire door and pass them through the boiler to an uptake above the fire door.
  • room for manoeuvre — If you have room for manoeuvre, you have the opportunity to change your plans if it becomes necessary or desirable.
  • rufous hummingbird — a reddish-brown hummingbird, Selasphorus rufus, of western North America.
  • rule of engagement — a directive issued by a military authority controlling the use and degree of force, especially specifying circumstances and limitations for engaging in combat.
  • russian federation — a republic extending from E Europe to N and W Asia. 6,593,000 sq. mi. (17,076,000 sq. km). Capital: Moscow.
  • safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
  • salt of phosphorus — a colorless, odorless, crystalline, water-soluble solid, NaNH 4 HPO 4 ⋅4H 2 O, originally obtained from human urine: used as a blowpipe flux in testing metallic oxides.
  • scruff of the neck — If someone takes you by the scruff of the neck, they take hold of the back of your neck or collar suddenly and roughly.
  • security of tenure — (in Britain) the right of a tenant to continue to occupy a dwelling or site unless the landlord obtains a court order for possession of the property or termination of the tenancy agreement
  • self-actualization — the achievement of one's full potential through creativity, independence, spontaneity, and a grasp of the real world.
  • self-instructional — pertaining to or constituting learning materials and conditions arranged so that students can proceed to learn on their own with little or no supervision.
  • self-justification — the act or fact of justifying oneself, especially of offering excessive reasons, explanations, excuses, etc., for an act, thought, or the like.
  • self-preoccupation — the state of being preoccupied.
  • self-raising flour — flour with baking powder
  • sequence of tenses — the sequence according to which the tense of a subordinate verb in a sentence is determined by the tense of the principal verb, as in I believe he is lying, I believed he was lying, etc
  • shift one's ground — to change one's argument or defense
  • shrubby cinquefoil — a small shrub, Potentilla fruticosa, of the rose family, native to the Northern temperate region, having pinnate leaves and numerous, showy, bright-yellow flowers.
  • 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.
  • six-finger country — an isolated area considered as being inhabited by people who practise inbreeding
  • slip of the tongue — If you describe something you said as a slip of the tongue, you mean that you said it by mistake.
  • sodium hyposulfite — sodium thiosulfate.
  • sodium polysulfide — a yellow-brown, water-soluble, granular powder, Na 2 S n , used chiefly in the manufacture of sulfur dyes, insecticides, and synthetic rubber.
  • sodium thiosulfate — a white, crystalline, water-soluble powder, Na 2 S 2 O 3 ⋅5H 2 O, used as a bleach and in photography as a fixing agent.
  • soft touch sealing — Soft touch sealing is a copolymer seal for a tank, with characteristics designed for softness, used instead of a metal seal to help avoid fire when sparks are generated.
  • soldier of fortune — a person who independently seeks pleasure, wealth, etc., through adventurous exploits.
  • solid-fuel heating — heating that uses solid fuel, such as coal or coke
  • sound and the fury — a novel (1929) by William Faulkner.
  • speak for yourself — If you say 'Speak for yourself' when someone has said something, you mean that what they have said is only their opinion or applies only to them.
  • spectrofluorimeter — an instrument in which the spectrum of secondarily emitted fluorescent light is used to identify chemical compounds.
  • spectrofluorometer — an instrument in which the spectrum of secondarily emitted fluorescent light is used to identify chemical compounds.
  • spur-of-the-moment — occurring or done without advance preparation or deliberation; extemporaneous; unplanned: a spur-of-the-moment decision.
  • squinting modifier — a word or phrase that can modify either the words that precede it or those that follow, as frequently in the sentence Studying frequently is tedious.
  • standoff insulator — a type of insulator that supports an electrical conductor at a distance from other elements or surfaces.
  • state of the union — A State of the Union speech or address is a speech, given once a year, in which the president of the United States talks about the current political issues that affect the country as a whole and about his plans for the year ahead.
  • stirling's formula — a relation that approximates the value of n factorial (n!), expressed as .
  • structural formula — a chemical formula showing the linkage of the atoms in a molecule diagrammatically, as H–O–H.
  • sub-classification — to arrange in subclasses.
  • sugarloaf mountain — a mountain in SE Brazil in Rio de Janeiro, at the entrance to Guanabara Bay. 1280 feet (390 meters).
  • sunflower seed oil — the oil extracted from sunflower seeds, used as a salad oil, in the manufacture of margarine, etc
  • surface-to-surface — (of a missile, message, etc.) capable of traveling from a base on the surface of the earth to a target also on the surface.
  • sutton-in-ashfield — a market town in N central England, in W Nottinghamshire. Pop: 41 951 (2001)
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