spectral

[spek-truhl]
adjective
1.
of or pertaining to a specter; ghostly; phantom.
2.
resembling or suggesting a specter.
3.
of, pertaining to, or produced by a spectrum or spectra.
4.
resembling or suggesting a spectrum or spectra.

Origin:
1710–20; < Latin spectr(um) (see specter) + -al1

spectrality, spectralness, noun
spectrally, adverb
nonspectral, adjective
nonspectrally, adverb
nonspectrality, noun
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World English Dictionary
spectral (ˈspɛktrəl)
 
adj
1.  of or like a spectre
2.  of or relating to a spectrum: spectral colours
3.  physics (of a physical quantity) relating to a single wavelength of radiation: spectral luminous efficiency
 
spectrality
 
n
 
'spectralness
 
n
 
'spectrally
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

spectral spec·tral (spěk'trəl)
adj.
Of, relating to, or produced by a spectrum.


spec·tral'i·ty (-trāl'ĭ-tē) or spec'tral·ness (-trəl-nĭs) n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The technique can distinguish living from dead coral by detecting spectral
  differences in the light that the reefs reflect.
The galaxy orientation might help, depending on where your new friends came
  from and perhaps their visual spectral range.
The infrared spectral region is ideal for observing cool sources and objects
  enshrouded in dust.
Taking advantage of spectral constancy allows the user to hear speech despite
  changes to pitch.
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