18-letter words containing f, u, l, t

relative frequency — the ratio of the number of times an event occurs to the number of occasions on which it might occur in the same period.
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.
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.
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.
selenium rectifier — a rectifier consisting of laminated plates of metal, usually iron, that have been coated with selenium on one side, with rectification taking place because the flow of electrons from the conductive metal to the selenium occurs more readily than the flow in the opposite direction.
self-actualization — the achievement of one's full potential through creativity, independence, spontaneity, and a grasp of the real world.
self-extinguishing — to put out (a fire, light, etc.); put out the flame of (something burning or lighted): to extinguish a candle.
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-understanding — mental process of a person who comprehends; comprehension; personal interpretation: My understanding of the word does not agree with yours.
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 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
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.
standoff insulator — a type of insulator that supports an electrical conductor at a distance from other elements or surfaces.
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).
sutton-in-ashfield — a market town in N central England, in W Nottinghamshire. Pop: 41 951 (2001)
the beautiful game — football
the final solution — the code name used by the Nazis to refer to the plan of mass murder of the Jews
the fourth of july — a holiday in the United States, traditionally celebrated with fireworks: the day of the adoption of the Declaration of Independence in 1776
the full treatment — If you say that someone is given the full treatment, you mean either that they are treated extremely well or that they are treated extremely severely.
theater of cruelty — a form of surrealist theater originated by Antonin Artaud and emphasizing the cruelty of human existence by portraying sadistic acts and intense suffering.
theatre of cruelty — a type of theatre advocated by Antonin Artaud in Le Théâtre et son double that seeks to communicate to its audience a sense of pain, suffering, and evil, using gesture, movement, sound, and symbolism rather than language
to find fault with — If you find fault with something or someone, you look for mistakes and complain about them.
to play favourites — to display favouritism
to plough a furrow — If you say that someone ploughs a particular furrow or ploughs their own furrow, you mean that their activities or interests are different or isolated from those of other people.
to pull a fast one — If you say that someone has pulled a fast one on you, you mean that they have cheated or tricked you.
tufted loosestrife — a primulaceous plant Naumburgia thyrsiflora
turn in on oneself — to withdraw or cause to withdraw from contact with others and become preoccupied with one's own problems
ultralow frequency — an electromagnetic wave with a frequency between 300 and 3000 hertz. Abbreviation: ULF, ulf.
ultraviolet filter — a filter used on a lens to absorb ultraviolet radiation that may impart an undesirable blue cast to a photograph.
university faculty — a division within a university comprising one subject area, or a number of related subject areas
ur of the chaldees — the city where Abraham was born, sometimes identified with the Sumerian city of Ur. Gen. 11:28, 31; 15:7; Neh. 9:7.
uriniferous tubule — a urine-bearing tubule in a nephron of a kidney.
where you left off — If something continues from where it left off, it starts happening again at the point where it had previously stopped.
wildlife sanctuary — an area where wild animals and plants are protected

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