18-letter words containing o, f, d
- potassium fluoride — a white, crystalline, hygroscopic, toxic powder, KF, used chiefly as an insecticide, a disinfectant, and in etching glass.
- prefect of studies — a senior master in a Jesuit school or college
- preferred position — especially desirable advertising space for which, if it is specifically requested by the advertiser, a publication charges a premium rate.
- primate of england — a title of the archbishop of Canterbury.
- prince of darkness — Satan.
- process identifier — (operating system) (PID) An integer used by the Unix kernel to uniquely identify a process. PIDs are returned by the fork system call and can be passed to wait() or kill() to perform actions on the given process.
- product life cycle — the four stages (introduction, growth, maturity, and decline) into one of which the sales of a product fall during its market life
- programme of study — the prescribed syllabus that pupils must be taught at each key stage in the National Curriculum
- protein deficiency — a lack or insuffiency of protein
- provably difficult — The set or property of problems for which it can be proven that no polynomial-time algorithm exists, only exponential-time algorithms.
- put a bold face on — to seem bold or confident about
- put one in mind of — to remind (one) of
- put your foot down — If someone puts their foot down, they use their authority in order to stop something happening.
- quarry-tiled floor — a floor covered with square or diamond-shaped unglazed floor tiles
- 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.
- reflection density — a measure of the extent to which a surface reflects light or other electromagnetic radiation, equal to the logarithm to base ten of the reciprocal of the reflectance
- refrigerated lorry — a lorry which is chilled in the back as for storing food
- reinforced plastic — plastic with fibrous matter, such as carbon fibre, embedded in it to confer additional strength
- reproduction proof — repro proof.
- restraint of trade — action tending to interrupt the free flow of goods and services, as by price fixing and other practices that have the effect of reducing competition.
- return to the fold — come back home
- rhondda cynon taff — a county borough in S Wales, created from part of Mid Glamorgan in 1996. Pop: 231 600 (2003 est). Area: 558 sq km (215 sq miles)
- rufous hummingbird — a reddish-brown hummingbird, Selasphorus rufus, of western North America.
- 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-deposit box — a lockable metal box or drawer, especially in a bank vault, used for safely storing valuable papers, jewelry, etc.
- schofield barracks — a town on central Oahu, in central Hawaii.
- school for scandal — a comedy of manners (1777) by Richard Brinsley Sheridan.
- seafloor spreading — a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
- secondary offering — the sale of a large block of outstanding stock off the floor of an exchange, usually by a major stockholder.
- self-comprehending — to understand the nature or meaning of; grasp with the mind; perceive: He did not comprehend the significance of the ambassador's remark.
- self-contradiction — an act or instance of contradicting oneself or itself.
- self-contradictory — an act or instance of contradicting oneself or itself.
- self-determination — determination by oneself or itself, without outside influence.
- sense of direction — Your sense of direction is your ability to know roughly where you are, or which way to go, even when you are in an unfamiliar place.
- shift one's ground — to change one's argument or defense
- sign of the zodiac — one of the twelve constellations along the path of the ecliptic.
- skin friction drag — aerodynamic resistance or drag due to the contact of moving air with the surface of an airplane, a glider, etc.
- society of friends — a Christian denomination, founded in England c. 1650 by George Fox, that has no formal creed, liturgy, or priesthood and rejects violence in human relations, esp. warfare
- soda-lime feldspar — plagioclase.
- 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.
- 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
- sonic depth finder — a sonar instrument that uses echolocation to measure depths under water.
- sound and the fury — a novel (1929) by William Faulkner.
- spotted flycatcher — a European woodland songbird, Muscicapa striata, with a greyish-brown streaked plumage: family Muscicapidae (Old World flycatchers)
- 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.
- stand confessed as — to be revealed or admitted as
- standard of living — a grade or level of subsistence and comfort in everyday life enjoyed by a community, class, or individual: The well-educated generally have a high standard of living.