spectral

Adjective

WordNet 3.0

of or relating to a spectrum“spectral colors”“spectral analysis”
resembling or characteristic of a phantom“a ghostly face at the window”“a phantasmal presence in the room”“spectral emanations”“spiritual tappings at a seance”Synonyms: apparitional ghostlike ghostly phantasmal spiritual

Spectral \Spec"tral\, a.

1.Of or pertaining to a specter; ghosty. [1913 Webster]

He that feels timid at the spectral form of evil is not the man to spread light.— F. W. Robertson.[1913 Webster]

2.(Opt.) Of or pertaining to the spectrum; made by the spectrum; as, spectral colors; spectral analysis. [1913 Webster]

Spectral lemur. (Zool.) See Tarsius. [1913 Webster]