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

  • spectrophotometry — an instrument for making photometric comparisons between parts of spectra.
  • 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.
  • spongy parenchyma — the lower layer of the ground tissue of a leaf, characteristically containing irregularly shaped cells with relatively few chloroplasts and large intercellular spaces.
  • spore mother cell — a cell from which a spore is produced
  • sports facilities — places and things for doing sports
  • 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.
  • stereophotography — photography producing stereoscopic images.
  • 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
  • sulfurated potash — a yellowish-brown mixture consisting mainly of potassium polysulfides and potassium thiosulfate, used in treating mange.
  • 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.
  • supernova remnant — an expanding shell of gas, with accompanying strong radio and x-ray emissions, produced by a supernova.
  • 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
  • suppressor t cell — a T cell capable of inhibiting the activity of B cells and other T cells.
  • supreme commander — the military officer commanding all allied forces in a theater of war.
  • 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.
  • swash plate motor — a collar or face plate on a shaft that is inclined at an oblique angle to the axis of rotation and converts reciprocating motion to rotation
  • synchronous speed — the speed at which an alternating-current machine must operate to generate electromotive force at a given frequency.
  • 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
  • take no prisoners — to be uncompromising and resolute in one's actions
  • take-no-prisoners — wholeheartedly aggressive; zealous; gung-ho: a businessman with a take-no-prisoners attitude toward dealmaking.
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