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• a  of or relating to a spectrum
  spectral colors
  spectral analysis
• s  resembling or characteristic of a phantom
  spectral emanations

• The spectral patterns also showed a presence of ionized carbon atoms that have been detected previously only in the most distant quasars.
• At the end of August, a wisp of flame suddenly appeared in the Arctic twilight over the Barents Sea, bathing the low clouds over the Norwegian port of Hammerfest in a spectral .
• Spirited Away, Miyazaki's masterpiece, is set in a spectral bathhouse.

• apparitional
• ghostlike
• ghostly
• phantasmal
• spiritual

News & Articles

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• Spectral MD Announces 510(k) Clearance by the FDA for DeepView™ Medical Imaging System
  Spectral MD™ (“Spectral MD” or “The Company”), a medical device imaging company, announces the DeepView™ Medical Imaging System has received 510(k) clearance from the U.S. Food and Drug Administration for studies of blood flow in microcirculation. The DeepView™ system is suitable for a wide variety of clinical applications including plastic surgery, diabetes, dermatology, vascular [PR.com]
  June 13, 2013 - PR.com
• Tornado Spectral Systems Of Canada And TNO Of The Netherlands Create Partnership
  Tornado Spectral Systems (TSS) has become a partner in TNO’s Van ‘t Hoff research program, which will benefit from the use of Tornado’s high-performance spectrometer and hyper-spectral imaging products.
  June 13, 2013 - PhotonicsOnline