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of or relating to a specter; ghostly; phantom.
resembling or suggesting a specter.
of, relating to, or produced by a spectrum or spectra.
resembling or suggesting a spectrum or spectra.
of or like a spectre
of or relating to a spectrum: spectral colours
(physics) (of a physical quantity) relating to a single wavelength of radiation: spectral luminous efficiency

spectral spec·tral (spěk’trəl)
Of, relating to, or produced by a spectrum.
spec·tral’i·ty (-trāl’ĭ-tē) or spec’tral·ness (-trəl-nĭs) n.


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  • Spectral-type

    noun, Astronomy. 1. a category for classifying a star, as A star or G star, according to features of its spectrum, as its shape as a function of temperature and wavelength and its absorption spectrum, that indicate the surface temperature of the star and the presence of particular atoms or molecules in its outer layers: […]

  • Spectra-yellow

    noun 1. a vivid yellow color.

  • Spectre

    noun, Chiefly British. 1. specter. noun 1. a visible incorporeal spirit, especially one of a terrifying nature; ghost; phantom; apparition. 2. some object or source of terror or dread: the specter of disease or famine. noun 1. a ghost; phantom; apparition 2. a mental image of something unpleasant or menacing: the spectre of redundancy

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