spectral

When something is spectral, it has a ghostlike quality; it seems to vanish or disappear. You may have heard of ghosts referred to as "specters": that means that they're spectral.

You may recognize the spect part of the adjective spectral from words like "spectacle," "spectrum," and "spectacular." All of these words share a similar meaning, which comes from the Latin verb specere, "look at, view." When something is spectral, think of it as something you can see but not touch — though it won't always mean that literally. The young model was so skinny she had a spectral quality: she almost seemed to disappear.

Primary Meanings of spectral

1.
adj
resembling or characteristic of a phantom
2.
adj
of or relating to a spectrum
Full Definitions of spectral
1

adj resembling or characteristic of a phantom

spectral emanations”
Synonyms:
apparitional, ghostlike, ghostly, phantasmal, spiritual
supernatural
not existing in nature or subject to explanation according to natural laws; not physical or material
2

adj of or relating to a spectrum

spectral colors”
spectral analysis”

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