a. | 1. | Of or pertaining to a specter; ghosty. | |||
2. | (Opt.) Of or pertaining to the spectrum; made by the spectrum;
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Adj. | 1. | spectral - of or relating to a spectrum; "spectral colors"; "spectral analysis" |
2. | spectral - like or being a phantom; "a ghostly face at the window"; "a phantasmal presence in the room"; "spectral emanations"; "spiritual tappings at a seance" |