There are 2 main definitions of spectral in English:

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spectral1

Line breaks: spec|tral
Pronunciation: /ˈspɛktr(ə)l
 
/

adjective

Of or like a ghost: a spectral, menacing face
More example sentences
  • Haunted Land takes us from pre-history to modern times, from Shamanism, through the wild hunt of Europe, to witches, werewolves and vampires and ends with road ghosts, spectral figures and phantom hitch-hikers.
  • It's brought the city welcome publicity hot on the spectral heels of the Ghost Festival.
  • The night music of the third movement flickered with spectral glissandos and eerie harmonics.
Synonyms
ghostly, wraithlike, shadowy, phantom, incorporeal, insubstantial, disembodied, unearthly, other-worldly;
ghastly, eerie, weird, uncanny
informal spooky

Origin

early 19th century: from spectre + -al.

Derivatives

spectrally

1
adverb
Example sentences
  • Another wonder is the Ghost Tree, its bare branches of the smoothness and colour of ivory curving skywards in supplication as it gleams spectrally in the dying light.

Definition of spectral in:

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There are 2 main definitions of spectral in English:

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spectral2

Line breaks: spec|tral
Pronunciation: /ˈspɛktr(ə)l
 
/

adjective

Of or concerning spectra or the spectrum.
Example sentences
  • A laser is the generator of intense coherent, electromagnetic radiation in the spectral range between ultra violet and infrared wavelengths.
  • The duration of reflectance spectral acquisition was less than 1 second during which the light source of the bronchoscope was switched off.
  • The principal steps in obtaining the spectral transmittance of specimens from these pictures are as follows.

Origin

mid 19th century: from spectrum + -al.

Derivatives

spectrally

1
adverb
Example sentences
  • Verification of the correct breathing frequency of 12 breaths/min was made by visually counting the respiratory trace on the computer display panel as well as by spectrally decomposing the respiratory wave.
  • The remaining artifact-free data were then spectrally analyzed using discrete Fourier transforms to yield power data for specific frequency bands.

Definition of spectral in:

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