Spectral

1. (a.) Of or pertaining to a specter; ghosty.

2. (a.) of or pertaining to the spectrum; made by the spectrum; as, spectral colors; spectral analysis.

Thesaurus Entries

Barmecidal, Barmecide, airy, apparent, apparitional, astral, autistic, bicolor, bicolored, cadaverous, chimeric, chromatic, cold, colorful, colorific, coloring, colory, cool, corpselike, crazy, daedal, deathlike, deceptive, delusional, delusionary, delusive, delusory, dereistic, dichromatic, disembodied, divers-colored, dreamlike, dreamy, ectoplasmic, eerie, erroneous, ethereal, etheric, fallacious, FALSE, fantastic, ghostish, ghostlike, ghostly, ghosty, glowing, harlequin, harmonious, illusional, illusionary, illusive, illusory, imaginary, incorporeal, kaleidoscopic, many-colored, matching, medley, misleading, monochromatic, monochrome, monochromic, motley, multicolor, multicolored, multicolorous, ostensible, parti-color, parti-colored, phantasmagoric, phantasmal, phantasmic, phantom, phantomic, phantomlike, pigmentary, polychromatic, polychrome, polychromic, prismal, prismatic, psychic, rainbow, seeming, self-deceptive, self-deluding, shadowy, shot, shot through, specious, specterlike, spiritual, spooky, supernatural, supposititious, thunder and lightning, tinctorial, tingent, toning, trichromatic, trichromic, tricolor, tricolored, two-tone, unactual, unearthly, unfounded, unreal, unsubstantial, varicolored, variegated, versicolor, versicolored, visionary, warm, weird, wraithlike, wraithy