You are correct!

From our dictionary:

spec•tral

Pronunciation: (spek'trul), [key]
—adj.
1. of or pertaining to a specter; ghostly; phantom.
2. resembling or suggesting a specter.
3. of, pertaining to, or produced by a spectrum or spectra.
4. resembling or suggesting a spectrum or spectra.

Yesterday's Word Quiz  |  Tomorrow's Word Quiz
Analogy Quiz
Spelling Bee
Advanced Word Quiz