The Collaborative International Dictionary
Spectrally \Spec"tral*ly\, adv. In the form or manner of a specter.
Wiktionary
adv. 1 In a spectral manner; like a ghost. 2 In terms of a spectrum.
Usage examples of "spectrally".
Closely followed by de Batz, he soon turned into the central corridor, which is open to the sky above, and was spectrally alight now with flag-stones and walls gleaming beneath the silvery sheen of the moon, and throwing back the fantastic elongated shadows of the two men as they walked.
Then only do we feel the power of the inspiration which could so subdue even stone that it shines spectrally possessed, and make the most insensate of materials voice forth the grand teaching of Christianity, the triumph of the spirit over the flesh.
The imposing buildings standing aloofly apart atop the hill called Tara were become but shadows, some limned darkly against the sky, others spectrally pale.
Wide sea fans swayed and beckoned in the eddies, and in the grey valleys they caught the light of the moon and waved spectrally, like fragments of the shrouds of men buried at sea.