There are 2 main definitions of spectral in English:

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spectral 1

Pronunciation: /ˈspektrəl/

adjective

Of or like a ghost.
Example sentences
  • It was probably a good idea to dispense with spectral evidence, since ghosts routinely resist cross-examination.
  • Dripping blood, lightning storms, and midnight crypt visits are only a few of the tricks that The Ghost has up its spectral sleeve.
  • Witnessing his sister's growing infatuation, Macon realizes his feelings are growing for Muriel, especially when he meets her sickly, spectral son, Alexander.
Synonyms
ghostly, phantom, wraithlike, shadowy, incorporeal, insubstantial, disembodied, unearthly, otherworldly
informal spooky

Derivatives

spectrally

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.

Origin

Early 18th century: from specter + -al.

For editors and proofreaders

Syllabification: spec·tral

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There are 2 main definitions of spectral in English:

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spectral 2

Pronunciation: /ˈspektrəl/

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.

Derivatives

spectrally

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.

Origin

Mid 19th century: from spectrum + -al.

For editors and proofreaders

Syllabification: spec·tral

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