The quality of being spectral or ghostly.

A musical composition practice in which compositional decisions are often informed by the analysis of sound spectra

In a spectral manner; like a ghost. / In terms of a spectrum.

plural of spectrality

Of, or pertaining to, spectres; ghostly. / Of, or pertaining to, spectra; classified according to frequency or wavelength (of light etc)

(uncountable) The quality of being spectral or ghostly. / (countable) Something spectral; a ghost, a spectre.

plural of spectral line

(mathematics) a theorem providing conditions under which an operator or matrix can be diagonalized

(astronomy) A classification of stars depending on their spectra and luminosity; usually one of O, B, A, F, G, K, M.

(physics) a dark or bright line in an otherwise continuous spectrum caused by the absorption or emission of light, at a single wavelength, by the movement of electrons between energy levels of an atom or molecule