1. in a ghostly or phantom-like manner
2. in relation to a spectrum or spectral analysis
Usage: scientific

Examples

• The figure appeared spectrally in the moonlight.
• She moved spectrally through the empty hallways.
• The data was analyzed spectrally to identify chemical compounds.
• The light was spectrally dispersed by the prism.
• The old mansion loomed spectrally against the dark sky.
• Scientists examined the sample spectrally using advanced equipment.