noun the visible colored rays of the solar spectrum, exhibiting the seven principal colors in their order, and covering the central and larger portion of the space of the whole spectrum.These, in the usual photogrophic methods, have their maximum influence at and beyond the violet rays, but are not limited to this region. noun a spectrum of rays considered solely with reference to their chemical effects, as in photography.It is characterized by dark spaces, bands, or lines. noun the spectrum of light which has passed through a medium capable of absorbing a portion of the rays.When the object is colored, the image appears of the complementary color, as a green image seen after viewing a red wafer lying on white paper. noun A luminous appearance, or an image seen after the eye has been exposed to an intense light or a strongly illuminated object.noun The several colored and other rays of which light is composed, separated by the refraction of a prism or other means, and observed or studied either as spread out on a screen, by direct vision, by photography, or otherwise.noun obsolete An apparition a specter.noun That portion, of any spectrum, which consists of rays less refrangible than the longest wave-lengths of the visible spectrum.įrom the GNU version of the Collaborative International Dictionary of English.noun The specific name of some animals, including Tarsius spectrum and Phyllostoma spectrum.noun A genus of lemuroid mammals: same as.noun A genus of gressorial orthopterous insects: same as.noun In zoology, a generic name variously used:.noun In physics, the continuous band of light ( visible spectrum) showing the successive prismatic colors, or the isolated lines or bands of color, observed when the radiation from such a source as the sun, or an ignited vapor in a gas-flame, is viewed after having been passed through a prism ( prismatic spectrum) or reflected from a diffraction-grating ( diffraction- or interference-spectrum).noun An image of something seen, continuing after the eyes are closed, covered, or turned away.noun A broad sequence or range of related qualities, ideas, or activities.noun A range of values of a quantity or set of related quantities.noun A range of radio frequencies assigned by a regulatory agency for use by a given group or organization.noun A graphic or photographic representation of such a measurable range a spectrogram. noun The entire range over which some measurable property of a physical system or phenomenon can vary, such as the frequency of sound, the wavelength of electromagnetic radiation, or the mass of specific kinds of particles.From The American Heritage® Dictionary of the English Language, 5th Edition.
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