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17-letter words containing p, o, t, s, i

  • rescue operations — operations or organized procedures to bring people or a person out of danger, attack, harm, etc
  • respiratory chain — a series of mitochondrial proteins that transport electrons of hydrogen, released in the Krebs cycle, from acetyl coenzyme A to inhaled oxygen to form H 2 O: the energy released in the process is conserved as ATP.
  • respiratory tract — the passages through which air enters and leaves the body
  • rhodope mountains — a mountain range in SE Europe, in the Balkan Peninsula extending along the border between Bulgaria and Greece. Highest peak: Golyam Perelik (Bulgaria), 2191 m (7188 ft)
  • rocket propulsion — propulsion of an object by thrust developed by a rocket.
  • roseate spoonbill — a tropical New World spoonbill, Ajaia ajaja, having rose-colored plumage and a bare head.
  • rotation of crops — a system of rotating in a fixed order the kinds of crops, as grain or grass, grown in the same field, to maintain soil fertility
  • safety inspection — an inspection of a place carried out to ensure that it is safe and not dangerous
  • safety precaution — a precaution that is taken in order to ensure that something is safe and not dangerous
  • saint christopher — Saint, died a.d. c250, Christian martyr.
  • scheme repository — A collection of free Scheme programs.
  • schmidt telescope — a wide-angle reflecting telescope used primarily for astronomical photography, in which spherical aberration and coma are reduced to a minimum by means of a spherical mirror with a corrector plate near its focus.
  • self-appreciation — gratitude; thankful recognition: They showed their appreciation by giving him a gold watch.
  • self-emancipation — the act of emancipating.
  • self-incompatible — not capable of self-pollination.
  • self-presentation — an act of presenting.
  • self-preservation — preservation of oneself from harm or destruction.
  • self-purification — a natural process of purifying, as the ability of a body of water to rid itself of pollutants.
  • self-reproduction — the act or process of reproducing.
  • semi-monopolistic — a person who has a monopoly.
  • semisophisticated — somewhat sophisticated.
  • sensitivity group — a group of persons participating in sensitivity training.
  • separation center — a place at which military personnel are processed for release from active service.
  • separation energy — binding energy (def 1).
  • settlement option — any of the options, other than immediate payment in a lump sum, by which the policyholder or beneficiary may choose to have the benefits of a policy paid.
  • shooting practice — practice in shooting for soldiers or other people who shoot guns
  • shopping precinct — pedestrian area with shops
  • shuttle diplomacy — diplomatic negotiations carried out by a mediator who travels back and forth between the negotiating parties.
  • slap on the wrist — a sharp blow or smack, especially with the open hand or with something flat.
  • sleep deprivation — a condition in which you have not had enough sleep
  • 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 position — the position that you sleep in
  • 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 .
  • spaghettification — the theoretical stretching of an object as it encounters extreme differences in gravitational forces, especially those associated with a black hole.
  • span of attention — attention span.
  • spatial summation — the act or process of summing.
  • special committee — a committee, as of a legislative body, that is formed to examine and report on a specific bill or issue.
  • special constable — a person recruited for temporary or occasional police duties, esp in time of emergency
  • special education — education that is modified or particularized for those with singular needs, as disabled or maladjusted people, slow learners, or gifted children.
  • 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
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