20-letter words containing u, n, r, f, a

freefall parachuting — a variety of parachuting in which the jumper manoeuvres in free fall before opening the parachute
frequency modulation — FM.
friar minor capuchin — capuchin (def 4).
frontenac et palluau — Comte de (Louis de Buade) 1620?–98, French governor of New France 1672–82, 1689–98.
fulminate of mercury — a gray, crystalline solid, Hg(CNO) 2 , used chiefly in the manufacture of commercial and military detonators.
fuming sulfuric acid — an oily, hygroscopic, corrosive liquid, H 2 S 2 O 7 , that, depending on purity, is colorless or dark brown: used chiefly as a dehydrating agent in the manufacture of explosives and as a sulfating or sulfonating agent in the manufacture of dyes.
fundamental particle — elementary particle.
fundamental research — research carried out to deepen understanding of the fundamental or basic principles of something
gentleman of fortune — an adventurer.
grand unified theory — a possible future quantum field theory that would encompass both the electroweak theory and quantum chromodynamics. Abbreviation: GUT.
gregory of nazianzus — Saint. ?329–89 ad, Cappadocian theologian: bishop of Caesarea (370–79). Feast days: Jan 2, 25, and 30
group life insurance — a form of life insurance available to members of a group, typically employees of a company, under a master policy.
hexafluoroantimonate — (inorganic chemistry) The anion SbF6- or any salt containing this anion; it is used as an acidic catalyst in epoxide opening reactions.
houses of parliament — In Britain, the Houses of Parliament are the British parliament, which consists of two parts, the House of Commons and the House of Lords. The buildings where the British parliament does its work are also called the Houses of Parliament.
hurricane-force wind — a wind, not necessarily a hurricane, having a speed of more than 72 miles per hour (32 m/sec): the strongest of the winds.
hydraulic fracturing — a process in which fractures in rocks below the earth's surface are opened and widened by injecting chemicals and liquids at high pressure: used especially to extract natural gas or oil.
hydrodesulfurization — desulfurization by catalytic agents of the sulfur-rich hydrocarbons obtained from petroleum or the like during cracking or hydrocracking.
ideal of pure reason — God, seen as an idea of pure reason unifying the personal soul with the cosmos.
in (or out of) gear — (not) connected to the motor
in (or out of) play — in (or not in) the condition for continuing play
in a state of nature — completely naked
in the lap of luxury — If you say that someone lives in the lap of luxury, you mean that they live in conditions of great comfort and wealth.
in the nature of sth — If you say that one thing is in the nature of another, you mean that it is like the other thing.
information builders — Distributors of LEVEL5 OBJECT. Telephone +1 800 969 INFO.
information industry — businesses that involve collecting and using information
intestinal fortitude — courage; resoluteness; endurance; guts: to have intestinal fortitude.
isochronous transfer — isochronous
joint life insurance — life insurance covering two or more persons, the benefits of which are paid after the first person dies.
junior featherweight — a boxer weighing up to 122 pounds (54.9 kg), between bantamweight and featherweight.
knock the tar out of — any of various dark-colored viscid products obtained by the destructive distillation of certain organic substances, as coal or wood.
law of large numbers — the theorem in probability theory that the number of successes increases as the number of experiments increases and approximates the probability times the number of experiments for a large number of experiments.
law of superposition — Geology. a basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it.
life-support machine — A life-support machine is the equipment that is used to keep a person alive when they are very ill and cannot breathe without help.
like a house on fire — If two people get on like a house on fire, they quickly become close friends, for example because they have many interests in common.
llywelyn ap gruffudd — died 1282, prince of Wales (1258–82): the only Welsh ruler to be recognized as such by the English
logarithmic function — a function defined by y = log bx, especially when the base, b, is equal to e, the base of natural logarithms.
longitudinal framing — a system for framing steel vessels in which light, closely spaced, longitudinal frames are connected by heavy, widely spaced transverse frames with deep webs.
manufacturer's agent — an agent representing one or more manufacturers in selling related but noncompeting goods, usually on a commission basis and in a particular territory.
mary, queen of scots — family name Stuart. 1542–87, queen of Scotland (1542–67); daughter of James V of Scotland and Mary of Guise. She was married to Francis II of France (1558–60), her cousin Lord Darnley (1565–67), and the Earl of Bothwell (1567–71), who was commonly regarded as Darnley's murderer. She was forced to abdicate in favour of her son (later James VI of Scotland) and fled to England. Imprisoned by Elizabeth I until 1587, she was beheaded for plotting against the English crown
mitral insufficiency — abnormal closure of the mitral valve resulting in regurgitation of blood into the atrium and leading to reduced heart function or heart failure.
most general unifier — (logic) If U is the most general unifier of a set of expressions then any other unifier, V, can be expressed as V = UW, where W is another substitution. See also unification.
naturalistic fallacy — the supposed fallacy of inferring evaluative conclusions from purely factual premises
new zealand fur seal — an Australasian seal, Arctocephalus forsteri
not put a foot wrong — If you never put a foot wrong, you never make any mistakes.
occupation franchise — the right of a tenant to vote in national and local elections
paper qualifications — qualifications gained through official examinations, etc, rather than through experience
pappus of alexandria — 3rd century bc, Greek mathematician, whose eight-volume Synagoge is a valuable source of information about Greek mathematics
permonosulfuric acid — persulfuric acid (def 1).
person of no account — (University of California at Santa Cruz) Used when referring to a person with no network address, frequently to forestall confusion. Most often as part of an introduction: "This is Bill, a person of no account, but he used to be [email protected]". Compare return from the dead.
probability function — the function the values of which are probabilities of the distinct outcomes of a discrete random variable

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