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17-letter words containing p, i, r, o

  • sleeper terrorist — a terrorist who is not currently active but assumes a guise in order to be in position, unsuspected, for future terrorist activities
  • sleeping problems — difficulties in getting to sleep or in staying asleep
  • slip-joint pliers — pliers having a sliding joint, permitting the span of the jaws to be adjusted.
  • social enterprise — a business organization that works to benefit society as a whole
  • sodium propionate — a transparent, crystalline, water-soluble powder, C 3 H 5 NaO 2 , used in foodstuffs to prevent mold growth, and in medicine as a fungicide.
  • sodium pyroborate — borax1 .
  • sodium-vapor lamp — an electric lamp in which sodium vapor is activated by current passing between two electrodes, producing a yellow, glareless light: used on streets and highways.
  • spectroheliograph — an apparatus for making photographs of the sun with a monochromatic light to show the details of the sun's surface and surroundings as they would appear if the sun emitted only that light.
  • spectrohelioscope — a spectroheliograph.
  • spectromicroscope — a microscope with an attached spectroscope.
  • spectroradiometer — an instrument for determining the radiant-energy distribution in a spectrum, combining the functions of a spectroscope with those of a radiometer.
  • spectroscopically — an optical device for producing and observing a spectrum of light or radiation from any source, consisting essentially of a slit through which the radiation passes, a collimating lens, and an Amici prism.
  • spectrum disorder — any of a group of disorders each having symptoms that occur on a continuum and certain features that are shared along its spectrum but that manifest in markedly different forms and degrees. See also autism spectrum disorder.
  • speech correction — the reeducation of speech habits that deviate from accepted speech standards.
  • speed restriction — the maximum speed allowed for road vehicles, trains, or other vehicles
  • spenserian sonnet — a sonnet employing the rhyme scheme abab, bcbc, cdcd, ee.
  • sperrin mountains — a mountain range in NW Northern Ireland
  • spherical polygon — a closed figure formed by arcs of great circles on a spherical surface.
  • spiny-headed worm — any of a small group of endoparasites of the phylum Acanthocephala, as larvae parasitic in insects and crustaceans and as adults in various vertebrates.
  • spiritual bouquet — the spiritual presentation of a good work to another person.
  • split keyboarding — the act or practice of editing data from one terminal on another terminal
  • split personality — multiple personality.
  • sports facilities — places and things for doing sports
  • spot-illustration — a rounded mark or stain made by foreign matter, as mud, blood, paint, ink, etc.; a blot or speck.
  • spotted sandpiper — a North American sandpiper, Actitis macularia, that has brownish-gray upper parts and white underparts, and is spotted with black in the summer.
  • spread your wings — if you spread your wings, you do something new and rather difficult or move to a new place, because you feel more confident in your abilities than you used to and you want to gain wider experience
  • spring cankerworm — the striped, green caterpillar of any of several geometrid moths: a foliage pest of various fruit and shade trees, as Paleacrita vernata (spring cankerworm) and Alsophila pometaria (fall cankerworm)
  • steamboat springs — a town in NW Colorado: ski resort.
  • stenothermophilic — growing best within a narrow temperature range.
  • stereolithography — a process for creating three-dimensional objects using a computer-controlled laser to build up the required structure, layer by layer, from a liquid photopolymer that solidifies.
  • stereospecificity — (of a reaction) producing a simple stereoisomer.
  • stir one's stumps — to move or become active
  • storm in a teacup — a violent fuss or disturbance over a trivial matter
  • subscription rate — the price charged for a subscription
  • super-nationalism — an extreme or fanatical loyalty or devotion to a nation.
  • superaerodynamics — the branch of aerodynamics that deals with gases at very low densities.
  • superalimentation — nourishment; nutrition.
  • supercolumniation — the placing of one order of columns above another.
  • superconductivity — the phenomenon of almost perfect conductivity shown by certain substances at temperatures approaching absolute zero. The recent discovery of materials that are superconductive at temperatures hundreds of degrees above absolute zero raises the possibility of revolutionary developments in the production and transmission of electrical energy.
  • superregeneration — regeneration in which a signal is alternately amplified and quenched at a frequency slightly above the audible range to achieve high sensitivity with a single tube.
  • superstitiousness — of the nature of, characterized by, or proceeding from superstition: superstitious fears.
  • supervision order — an order by a juvenile court requiring a named probation officer or local-authority social worker to advise, assist, and befriend a child or young person who is the subject of care proceedings, over a period of up to three years
  • supervisory board — a board of management of which nonmanagerial workers are members, having supervisory powers over some aspects of management decision-making
  • support mechanism — any formal system or method of providing support or assistance
  • supra-nationalism — outside or beyond the authority of one national government, as a project or policy that is planned and controlled by a group of nations.
  • surprise symphony — the Symphony No. 94 in G major (1791) by Franz Josef Haydn.
  • suspension bridge — a bridge having a deck suspended from cables anchored at their extremities and usually raised on towers.
  • tactile corpuscle — an oval sense organ made of flattened cells and encapsulated nerve endings, occurring in hairless skin, as the tips of the fingers and toes, and functioning as a touch receptor.
  • taiping rebellion — a movement of religious mysticism and agrarian unrest in China between 1850 and 1864 which weakened the Manchu dynasty but was eventually suppressed with foreign aid
  • take in good part — to respond to (teasing) with good humour
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