spectrum

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.

noun

A graphic or photographic representation of such a measurable range; a spectrogram.

noun

A range of radio frequencies assigned by a regulatory agency for use by a given group or organization.

noun

A range of values of a quantity or set of related quantities.

noun

A broad sequence or range of related qualities, ideas, or activities.

noun

That portion, of any spectrum, which consists of rays less refrangible than the longest wave-lengths of the visible spectrum.

noun

A specter; a ghostly phantom.

noun

An image of something seen, continuing after the eyes are closed, covered, or turned away.