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Showing words for SPECTRA using the English dictionary
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Definitions for Spectra
[1] a plural of spectrum.
[2] Physics . an array of entities, as light waves or particles, ordered in accordance with the magnitudes of a common physical property, as wavelength or mass: often the band of colors produced when sunlight is passed through a prism, comprising red, orange, yellow, green, blue, indigo, and violet. this band or series of colors together with extensions at the ends that are not visible to the eye, but that can be studied by means of photography, heat effects, etc., and that are produced by the dispersion of radiant energy other than ordinary light rays. Compare band spectrum, electromagnetic spectrum, mass spectrum.
[3] 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 sequence: the spectrum of political beliefs.
[4] the plural of spectrum
[5] the distribution of colours produced when white light is dispersed by a prism or diffraction grating. There is a continuous change in wavelength from red, the longest wavelength, to violet, the shortest. Seven colours are usually distinguished: violet, indigo, blue, green, yellow, orange, and red
[6] the whole range of electromagnetic radiation with respect to its wavelength or frequency
[7] any particular distribution of electromagnetic radiation often showing lines or bands characteristic of the substance emitting the radiation or absorbing it See also absorption spectrum, emission spectrum
[8] any similar distribution or record of the energies, velocities, masses, etc, of atoms, ions, electrons, etc a mass spectrum
[9] any range or scale, as of capabilities, emotions, or moods
[10] another name for an afterimage
Words related to Spectra
scope, gamut, sphere, range, continuum, rainbow, scale, span, sweep, field, extent, compass, series, colors, distribution, sequence
Words nearby Spectra
spectator sport, spectator, the, specter, spectinomycin, spector, spectra, spectra yellow, spectral, spectral line, spectral luminous efficiency, spectral series
Origin of Spectra
um1605–15; < Latin: appearance, form, equivalent to spec(ere ) to look, regard + -trum instrumental noun suffix
Word origin for Spectra
umC17: from Latin: appearance, image, from spectāre to observe, from specere to look at
Synonyms for Spectra
rainbow, chromatic spectrum, hue cycle