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}. (Zo["o]l.) See {Tarsius}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.