spectrality (spɛkˈtrælɪtɪ) or spectralness (ˈspectralness)
spectral for learners of EnglishPowered by COBUILD (spektrəl)
If you describe someone or something as spectral, you mean that they look like a ghost. [literary] ⇒ She is compelling, spectral, fascinating, an unforgettably unique performer. ⇒ ...the spectral quality of the light.