spectral
1. [ adjective ] of or relating to a spectrum
Examples:

"spectral colors" "spectral analysis"

Related terms: spectrum
2. [ adjective ] like or being a phantom
Synonyms: ghostlike ghostly phantasmal spiritual apparitional
Examples:

"a ghostly face at the window" "a phantasmal presence in the room" "spectral emanations" "spiritual tappings at a seance"

Related terms: supernatural
Similar spelling:   spectre
  Spector
  specter
  spectrogram
  spectrum
  spectator
  spectacle
  Specht
  spice_tree
  spectacles
  spectacled
  spicate
  spectacular
  spectate