spectrum
nounThe 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.
nounA graphic or photographic representation of such a measurable range; a spectrogram.
nounA range of radio frequencies assigned by a regulatory agency for use by a given group or organization.
nounA range of values of a quantity or set of related quantities.
nounA broad sequence or range of related qualities, ideas, or activities.
nounThat portion, of any spectrum, which consists of rays less refrangible than the longest wave-lengths of the visible spectrum.
nounA specter; a ghostly phantom.
nounAn image of something seen, continuing after the eyes are closed, covered, or turned away.