Definition of spectral adjective from the Oxford Advanced Learner's Dictionary

     

    spectral

     adjective
    adjective
    BrE BrE//ˈspektrəl//
     
    ; NAmE NAmE//ˈspektrəl//
     
     
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  1. 1(literary) like a ghost; connected with a ghost a spectral figure
  2. 2(specialist) connected with a spectrum spectral bands the full spectral range
  3. Word Origin sense 1 early 19th cent.: from spectre + -al. sense 2 mid 19th cent.: from spectrum + -al.
See the Oxford Advanced American Dictionary entry: spectral