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15-letter words containing um

  • petroleum ether — a volatile mixture of the higher alkane hydrocarbons, obtained as a fraction of petroleum and used as a solvent
  • petroleum jelly — sticky substance used as lubricant
  • platinum blonde — a person, especially a girl or woman, whose hair is of a pale blond or silver color, usually colored artificially by bleaching or dyeing.
  • pleuropneumonia — pleurisy conjoined with pneumonia.
  • plumbaginaceous — belonging to the Plumbaginaceae, the leadwort family of plants.
  • plumber's snake — snake (def 3a).
  • plumbers-friend — Machinery. a pistonlike reciprocating part moving within the cylinder of a pump or hydraulic device.
  • pneumatic drill — a percussive power drill powered by compressed air
  • pneumatotherapy — the use of compressed or rarefied air in treating disease.
  • positive column — the luminous region between the Faraday dark space and the anode glow in a vacuum tube, occurring when the pressure is low.
  • pre-consumption — the act of consuming, as by use, decay, or destruction.
  • proscenium arch — the arch separating the stage from the auditorium
  • protonephridium — a tubular, excretory structure in certain invertebrates, as flatworms, rotifers, and some larvae, usually ending internally in flame cells and having an external pore
  • purple trillium — birthroot (def 1).
  • quantum gravity — a theory of the gravitational interaction that involves quantum mechanics to explain the force
  • rational number — a number that can be expressed exactly by a ratio of two integers.
  • redocumentation — The creation or revision of a semantically equivalent representation within the same relative abstraction level. The resulting forms of representation are usually considered alternate views intended for a human audience.
  • reed instrument — a wind instrument with a single or double reed, as a saxophone or an oboe.
  • regular premium — A regular premium is money paid to buy insurance coverage in installments at particular time intervals, such as monthly or annually.
  • reynolds number — a dimensionless number, vρl/η, where v is the fluid velocity, ρ the density, η the viscosity and l a dimension of the system. The value of the number indicates the type of fluid flow
  • rheumatic fever — a serious disease, associated with streptococcal infections, usually affecting children, characterized by fever, swelling and pain in the joints, sore throat, and cardiac involvement.
  • rheumatism-root — spotted wintergreen.
  • right of asylum — the right of alien fugitives to protection or nonextradition in a country or its embassy.
  • rockwell number — a numerical expression of the hardness of a metal as determined by a test (Rockwell test) made by indenting a test piece with a Brale, or with a steel ball of specific diameter, under two successive loads and measuring the resulting permanent indentation.
  • rod pumped well — A rod pumped well is a well with a nodding donkey to remove fluid mechanically.
  • rump parliament — the remnant of the Long Parliament established by the expulsion of the Presbyterian members in 1648, dismissed by force in 1653, and restored briefly in 1659–60.
  • rumpelstiltskin — a dwarf in a German folktale who spins flax into gold for a young woman to meet the demands of the prince she has married, on the condition that she give him her first child or else guess his name: she guesses his name and he vanishes or destroys himself in a rage.
  • sb's trump card — Your trump card is something powerful that you can use or do, which gives you an advantage over someone.
  • schola cantorum — an ecclesiastical choir or choir school.
  • school-gate mum — a young family-oriented working mother, considered by political parties as forming a significant part of the electorate
  • scpi consortium — (body)   A body established to promote Standard Commands for Programmable Instruments. Address: 8380 Hercules Drive, Suite P3, La Mesa, CA 91942, USA.
  • semidocumentary — a film or television programme that is fictional but includes many factual events or details
  • sense of humour — Someone who has a sense of humour often finds things amusing, rather than being serious all the time.
  • serum hepatitis — hepatitis B.
  • simple pendulum — a hypothetical apparatus consisting of a point mass suspended from a weightless, frictionless thread whose length is constant, the motion of the body about the string being periodic and, if the angle of deviation from the original equilibrium position is small, representing simple harmonic motion (distinguished from physical pendulum).
  • slumpflationary — of or relating to slumpflation
  • sodium arsenite — a white or grayish-white, water-soluble, poisonous powder, NaAsO 2 , used chiefly in arsenical soaps for hides, as an insecticide, and as a weed-killer.
  • sodium benzoate — a white crystalline soluble compound used as an antibacterial and antifungal agent in preserving food (E211), as an antiseptic, and in making dyes and pharmaceuticals. Formula: (C6H5COO)Na
  • sodium chlorate — a colorless, water-soluble solid, NaClO 3 , cool and salty to the taste, used chiefly in the manufacture of explosives and matches, as a textile mordant, and as an oxidizing and bleaching agent.
  • sodium chloride — salt1 (def 1).
  • sodium citrates — the sodium salts of citric acid (monosodium citrate, disodium citrate, trisodium citrate)
  • sodium ethylate — a white, hygroscopic powder, C 2 H 5 ONa, that is decomposed by water into sodium hydroxide and alcohol: used chiefly in organic synthesis.
  • sodium fluoride — a colorless, crystalline, water-soluble, poisonous solid, NaF, used chiefly in the fluoridation of water, as an insecticide, and as a rodenticide.
  • sodium monoxide — a white powder, Na 2 O, that reacts violently with water to produce sodium hydroxide.
  • sodium peroxide — a yellowish-white, hygroscopic, water-soluble powder, Na 2 O 2 , used chiefly as a bleaching agent and as an oxidizing agent.
  • sodium silicate — a substance having the general formula, Na2O.xSiO2, where x varies between 3 and 5, existing as an amorphous powder or present in a usually viscous aqueous solution
  • sodium stearate — Sodium stearate is a salt of stearic acid used as a surfactant (= a substance that reduces the surface tension of a liquid and allows it to foam) in order to aid the solubility of hydrophobic substances in oral medicines.
  • sodium sulphate — a solid white substance that occurs naturally as thenardite and is usually used as the white anhydrous compound (salt cake) or the white crystalline decahydrate (Glauber's salt) in making glass, detergents, and pulp. Formula: Na2SO4
  • source document — a document that has been or will be transcribed to a word processor or to the memory bank of a computer
  • souvanna phouma — Prince, 1901–84, Laotian statesman: premier 1951–54, 1956–58, 1960, and 1962–75.
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