Of or like a ghost.
ghostly, wraithlike, shadowy, phantom, incorporeal, insubstantial, disembodied, unearthly, other-worldlyghastly, eerie, weird, uncannyspookyphantasmal, phantasmicView synonyms
- ‘Dripping blood, lightning storms, and midnight crypt visits are only a few of the tricks that The Ghost has up its spectral sleeve.’
- ‘You will walk by the locations of numerous ghostly sightings and hear of mysterious, unexplained happenings and spine-tingling depictions of spectral interaction with current residents and employees.’
- ‘Behind him, in single file, was an infinite line of spectral children, their long, pale fingers grabbing the air, every movement so chaotic, yet so beautifully harmonious.’
- ‘Only his face showed differently, a stark white mask that floated towards the surface of his new spectral incarnation.’
- ‘It was probably a good idea to dispense with spectral evidence, since ghosts routinely resist cross-examination.’
- ‘Witnessing his sister's growing infatuation, Macon realizes his feelings are growing for Muriel, especially when he meets her sickly, spectral son, Alexander.’
Early 18th century: from specter + -al.
Of or concerning spectra or the spectrum.
- ‘Little is known about this, but either or both of the quantity and spectral quality of light could conceivably be significant in various ways.’
- ‘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.’
- ‘A laser is the generator of intense coherent, electromagnetic radiation in the spectral range between ultra violet and infrared wavelengths.’
- ‘The patterns to be copied and the blocks themselves are not finely detailed and the spectral differences between red and white sections are quite large.’
Mid 19th century: from spectrum + -al.