20-letter words containing f, e, n, l, u, r
- liquidity preference — (in Keynesian economics) the degree of individual preference for cash over less liquid assets.
- llywelyn ap gruffudd — died 1282, prince of Wales (1258–82): the only Welsh ruler to be recognized as such by the English
- 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.
- new zealand fur seal — an Australasian seal, Arctocephalus forsteri
- 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
- period of revolution — a rather large interval of time that is meaningful in the life of a person, in history, etc., because of its particular characteristics: a period of illness; a period of great profitability for a company; a period of social unrest in Germany.
- permonosulfuric acid — persulfuric acid (def 1).
- quantum field theory — any theory in which fields are treated by the methods of quantum mechanics; each field can then be regarded as consisting of particles of a particular kind, which may be created and annihilated.
- refuse disposal unit — a unit or part of a sink that disposes of waste food, etc, by grinding
- ring of the nibelung — Richard Wagner's tetralogy of music dramas: Das Rheingold (completed 1869), Die Walküre (completed 1870), Siegfried (completed 1876), and Götterdämmerung (completed 1876): the cycle was first performed at Bayreuth, 1876.
- squirrel's-foot fern — ball fern.
- strong nuclear force — an interaction between elementary particles responsible for the forces between nucleons in the nucleus. It operates at distances less than about 10–15 metres, and is about a hundred times more powerful than the electromagnetic interaction
- thomas of erceldoune — Thomas of, Thomas of Erceldoune.
- to burst into flames — If something bursts into flames or bursts into flame, it suddenly starts burning strongly.
- to fall on your feet — If you say that someone always falls or lands on their feet, you mean that they are always successful or lucky, although they do not seem to achieve this by their own efforts.
- to land on your feet — If you say that someone always lands on their feet, you mean that they are always successful or lucky, although they do not seem to achieve this by their own efforts.
- turn over a new leaf — one of the expanded, usually green organs borne by the stem of a plant.
- unemployment figures — statistics relating to the number of people who are out of work
- unified field theory — electroweak theory.
- universal quantifier — a quantifier indicating that the sentential function within its scope is true for all values of any variable included in the quantifier.
- until further notice — If a situation is said to exist until further notice, it will continue for an uncertain length of time until someone changes it.
- uranium hexafluoride — a colorless, water-insoluble, crystalline, volatile solid, UF 6 , used in its gaseous state in separating uranium 235 from uranium.
- viscount northcliffe — Viscount, Alfred Charles William Harmsworth.
- wardrobe malfunction — an embarrassing situation caused by the clothes a person is wearing
- whole-life insurance — a type of insurance with a savings element that is guaranteed to pay out on death provided premiums have been paid as required by the policy