Found 2 items, similar to spectrally.
English → English (WordNet) Definition: spectral spectral adj 1: of or relating to a spectrum; “spectral colors”; “spectral analysis” 2: like or being a phantom; “a ghostly face at the window”; “a phantasmal presence in the room”; “spectral emanations”; “spiritual tappings at a seance” [syn: apparitional, ghostlike, ghostly, phantasmal, spiritual]
English → English (gcide) Definition: Spectrally Spectrally \Spec"tral*ly\, adv. In the form or manner of a specter. [1913 Webster]