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  • Spectre

    specter., a ghostly appearing figure; "we were unprepared for the apparition that confronted us"[syn: apparition ], a mental representation of some...
  • Spectrogram

    a representation or photograph of a spectrum., sound spectrogram.
  • Spectrograph

    a spectroscope for photographing or producing a representation of a spectrum., sound spectrograph.
  • 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...
  • Spectrohelioscope

    a spectroheliograph., a similar instrument, used for visual instead of photographic observations.
  • Spectrometer

    an optical device for measuring wavelengths, deviation of refracted rays, and angles between faces of a prism, esp. an instrument (prism spectrometer)...
  • Spectrometry

    an optical device for measuring wavelengths, deviation of refracted rays, and angles between faces of a prism, esp. an instrument (prism spectrometer)...
  • Spectrophotometer

    an instrument for making photometric comparisons between parts of spectra.
  • Spectroscope

    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...
  • Spectroscopy

    the science that deals with the use of the spectroscope and with spectrum analysis.
  • Spectrum

    physics ., a broad range of varied but related ideas or objects, the individual features of which tend to overlap so as to form a continuous series or...
  • Specula

    a mirror or reflector, esp. one of polished metal, as on a reflecting telescope., speculum metal., surgery . an instrument for rendering a part accessible...
  • Specular

    pertaining to or having the properties of a mirror., pertaining to a speculum., optics . (of reflected light) directed, as from a smooth, polished surface...
  • Speculate

    to engage in thought or reflection; meditate (often fol. by on, upon, or a clause)., to indulge in conjectural thought., to engage in any business transaction...
  • Speculation

    the contemplation or consideration of some subject, a single instance or process of consideration., a conclusion or opinion reached by such contemplation,...
  • Speculative

    pertaining to, of the nature of, or characterized by speculation, contemplation, conjecture, or abstract reasoning, theoretical, rather than practical,...
  • Speculativeness

    pertaining to, of the nature of, or characterized by speculation, contemplation, conjecture, or abstract reasoning, theoretical, rather than practical,...
  • Speculator

    a person who is engaged in commercial or financial speculation., a person who makes advance purchases of tickets, as to games or theatrical performances,...
  • Speculum

    a mirror or reflector, esp. one of polished metal, as on a reflecting telescope., speculum metal., surgery . an instrument for rendering a part accessible...
  • Sped

    a pt. and pp. of speed.
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