18-letter words containing r, o, u, t, s
- national guardsman — guardsman (def 2).
- national insurance — In Britain, national insurance is the state system of paying money to people who are ill, unemployed, or retired. It is financed by money that the government collects from people who work, or from their employers.
- natural philosophy — natural science.
- nebular hypothesis — the theory that the solar system evolved from a mass of nebular matter: prominent in the 19th century following its precise formulation by Laplace.
- neovascularization — the development of new blood vessels, especially in tissues where circulation has been impaired by trauma or disease.
- nervous exhaustion — extreme mental and physical fatigue caused by excessive emotional stress; neurasthenia.
- neuroleptanalgesia — a semiconscious nonreactive state induced by certain drug combinations, as fentanyl with droperidol.
- neutrino astronomy — the branch of astronomy dealing with the detection and measurement of neutrinos emitted by the sun and other celestial objects.
- neutrosophic logic — (logic) (Or "Smarandache logic") A generalisation of fuzzy logic based on Neutrosophy. A proposition is t true, i indeterminate, and f false, where t, i, and f are real values from the ranges T, I, F, with no restriction on T, I, F, or the sum n=t+i+f. Neutrosophic logic thus generalises: - intuitionistic logic, which supports incomplete theories (for 0
- no-fault insurance — Also called no-fault insurance. a form of automobile insurance designed to enable the policyholder in case of an accident to collect a certain basic compensation promptly for economic loss from his or her own insurance company without determination of liability.
- nocturnal emission — the release of semen during sleep, often during a sexual dream.
- non-circumstantial — of pertaining to, or derived from circumstances: a circumstantial result.
- non-understandable — capable of being understood; comprehensible.
- nondestructiveness — The quality of not being destructive.
- nonintercourse act — the act of Congress (1809) prohibiting all shipping and trade between the United States and British- or French-controlled ports.
- nonpartisan league — a political organization of farmers, founded in North Dakota in 1915, and extending to many states west of the Mississippi, with the aim of influencing agricultural legislation in state legislatures.
- nonstriated muscle — smooth muscle
- north truchas peak — a mountain in N New Mexico, near Santa Fe: one of the three Truchas Peaks. 13,110 feet (3999 meters).
- nurse practitioner — a registered nurse who has received special training for diagnosing and treating routine or minor ailments. Abbreviation: NP.
- nurse-practitioner — a registered nurse who has received special training for diagnosing and treating routine or minor ailments. Abbreviation: NP.
- old curiosity shop — a novel (1840–41) by Dickens.
- open heart surgery — surgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
- open-heart surgery — surgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
- optical soundtrack — the final soundtrack on a motion picture, which appears as a band of black and white serrations along a strip of film to the left of the composite print. Light is shined through the serrations and is converted to audible sound.
- order of australia — an order awarded to Australians for outstanding achievement or for service to Australia or to humanity at large; established in 1975
- orientation course — induction into sth
- orthopedic surgery — corrective operation on bones or joints
- orthotungstic acid — an oxyacid acid of tungsten. Formula: H2WO4
- outer automorphism — an automorphism that is not an inner automorphism.
- over-conscientious — governed by conscience; controlled by or done according to one's inner sense of what is right; principled: She's a conscientious judge, who does not let personal prejudices influence her decisions.
- overpressurization — pressure in excess of normal atmospheric pressure, as that caused by an explosion's shock wave or created in an accelerating airplane.
- ox-tongue partisan — a shafted weapon having a long, wide, tapering blade.
- par for the course — an equality in value or standing; a level of equality: The gains and the losses are on a par.
- pass the hat round — to collect money, as for a cause
- passing-out parade — a ceremonial parade of cadets who have completed their training
- pensioneer trustee — (in Britain) a person authorized by HMRC to oversee the management of a pension fund
- percussion section — orchestra, group: drums, etc.
- perfect continuous — perfect progressive.
- perish the thought — to die or be destroyed through violence, privation, etc.: to perish in an earthquake.
- petite bourgeoisie — the portion of the bourgeoisie having the least wealth and lowest social status; the lower middle class.
- pitch-and-run shot — chip shot.
- population figures — population totals; statistics relating to the size of populations
- porter-house steak — Also called porterhouse steak. a choice cut of beef from between the prime ribs and the sirloin.
- portuguese guinean — of or relating to Portuguese Guinea, a former name for Guinea-Bissau, or its inhabitants
- post-revolutionary — of, pertaining to, characterized by, or of the nature of a revolution, or a sudden, complete, or marked change: a revolutionary junta.
- potassium chlorate — a white or colorless, crystalline, water-soluble, poisonous solid, KClO 3 , used chiefly as an oxidizing agent in the manufacture of explosives, fireworks, matches, bleaches, and disinfectants.
- potassium chloride — a white or colorless, crystalline, water-soluble solid, KCl, used chiefly in the manufacture of fertilizers and mineral water, and as a source of other potassium compounds.
- potassium fluoride — a white, crystalline, hygroscopic, toxic powder, KF, used chiefly as an insecticide, a disinfectant, and in etching glass.
- potassium myronate — sinigrin.
- precious moonstone — moonstone (def 1).