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20-letter words containing c, l, e, f

  • potential difference — voltage
  • prefecture apostolic — a territory in the early stage of missionary development.
  • public record office — an institution in which official records are stored and kept available for inspection by the public
  • red mercuric sulfide — a crystalline, water-insoluble, poisonous compound, HgS, occurring as a coarse, black powder (black mercuric sulfide) or as a fine, bright-scarlet powder (red mercuric sulfide) used chiefly as a pigment and as a source of the free metal.
  • reflecting telescope — an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens set into one end of a tube and an adjustable eyepiece or combination of lenses set into the other end of a tube that slides into the first and through which the enlarged object is viewed directly; the other form (reflecting telescope) has a concave mirror that gathers light from the object and focuses it into an adjustable eyepiece or combination of lenses through which the reflection of the object is enlarged and viewed. Compare radio telescope.
  • refracting telescope — an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens set into one end of a tube and an adjustable eyepiece or combination of lenses set into the other end of a tube that slides into the first and through which the enlarged object is viewed directly; the other form (reflecting telescope) has a concave mirror that gathers light from the object and focuses it into an adjustable eyepiece or combination of lenses through which the reflection of the object is enlarged and viewed. Compare radio telescope.
  • republic of maldives — a republic occupying an archipelago of 1087 coral islands in the Indian Ocean, southwest of Sri Lanka: came under British protection in 1887; became independent in 1965 and a republic in 1968; member of the Commonwealth (1982–2016). The economy and infrastructure were severely damaged in the Indian Ocean tsunami of December 2004. Official language: Divehi. Official religion: (Sunni) Muslim. Currency: rufiyaa. Capital: Malé. Pop: 393 988 (2013 est). Area: 298 sq km (115 sq miles)
  • royal air force list — an official list of all serving commissioned officers of the RAF and reserve officers liable for recall
  • scientific socialism — Marxist socialism
  • second earl of essex — 2nd Earl of, Devereux, Robert.
  • second law of motion — any of three laws of classical mechanics, either the law that a body remains at rest or in motion with a constant velocity unless an external force acts on the body (first law of motion) the law that the sum of the forces acting on a body is equal to the product of the mass of the body and the acceleration produced by the forces, with motion in the direction of the resultant of the forces (second law of motion) or the law that for every force acting on a body, the body exerts a force having equal magnitude and the opposite direction along the same line of action as the original force (third law of motion or law of action and reaction)
  • sergeant first class — a noncommissioned officer ranking next above a staff sergeant and below a first or master sergeant.
  • sodium fluoroacetate — a white, amorphous, water-soluble, poisonous powder, C 2 H 2 FO 2 Na, used as a rodenticide.
  • soft gelatin capsule — A soft gelatin capsule is a type of capsule that is usually used to contain medicine in the form of liquid or powder, and which dissolves more quickly than a hard gelatin capsule.
  • solitary confinement — the confinement of a prisoner in a cell or other place in which he or she is completely isolated from others.
  • spiral of archimedes — a curve that is the locus of a point that moves outward with uniform speed along a vector, beginning at the origin, while the vector rotates about the origin with uniform angular velocity. Equation (in polar coordinates): r = aθ.
  • split the difference — the state or relation of being different; dissimilarity: There is a great difference between the two.
  • staff of aesculapius — a representation of a forked staff with an entwining serpent, used as a symbol of the medical profession and as the insignia of the American Medical Association and other medical organizations. Compare caduceus (def 2).
  • 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
  • the like(s) of which — If you refer to something the like of which or the likes of which has never been seen before, you are emphasizing how important, great, or noticeable the thing is.
  • the luck of the draw — If you say that something is the luck of the draw, you mean that it is the result of chance and you cannot do anything about it.
  • there is no call for — If you say that there is no call for someone to behave in a particular way, you are criticizing their behaviour, usually because you think it is rude.
  • thomas of erceldoune — Thomas of, Thomas of Erceldoune.
  • to come to full term — to be carried or last until the ninth month of gestation or pregnancy
  • to flex your muscles — If a group, organization, or country flexes its muscles, it does something to impress or frighten people, in order to show them that it has power and is considering using it.
  • trumpet call for sth — a signal for something
  • 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.
  • van der waals forces — weak electrostatic forces between atoms and molecules caused by transient distortions in the distribution of electrons in the interacting atoms or molecules
  • vertical lift bridge — lift bridge.
  • viscount northcliffe — Viscount, Alfred Charles William Harmsworth.
  • wardrobe malfunction — an embarrassing situation caused by the clothes a person is wearing
  • warehouse facilities — places for storing goods
  • 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
  • whyte classification — a system for classifying steam locomotives according to the total number of wheels on the front trucks, drivers, and rear trucks, in that order. For example, a Pacific locomotive is designated as 4-6-2.
  • zone of accumulation — B horizon.
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