We found 29 dictionaries that define the word spectral:

General (23 matching dictionaries)

1. spectral: Longman Dictionary of Contemporary English
2. spectral: Merriam-Webster
3. spectral, spectral: Oxford Learner's Dictionaries
4. spectral: American Heritage Dictionary of the English Language
5. spectral: Collins English Dictionary
6. spectral: Vocabulary.com
7. Spectral, spectral: Wordnik
8. spectral: Cambridge Advanced Learner's Dictionary
9. spectral: Wiktionary
10. spectral: Webster's New World College Dictionary, 4th Ed.
11. spectral: The Wordsmyth English Dictionary-Thesaurus
12. spectral: Infoplease Dictionary
13. spectral: Dictionary.com
14. Spectral (disambiguation), Spectral (film), Spectral: Wikipedia, the Free Encyclopedia
15. Spectral: Online Plain Text English Dictionary
16. spectral: Webster's Revised Unabridged, 1913 Edition
17. spectral: Rhymezone
18. Spectral: AllWords.com Multi-Lingual Dictionary
19. spectral: FreeDictionary.org
20. spectral: Mnemonic Dictionary
21. spectral: TheFreeDictionary.com

Computing (1 matching dictionary)

22. spectral: Encyclopedia

Medicine (3 matching dictionaries)

23. spectral: Merriam-Webster Medical Dictionary
24. online medical dictionary (No longer online)
25. spectral: Medical dictionary

Miscellaneous (1 matching dictionary)

26. SPECTRAL: Acronym Finder

Tech (1 matching dictionary)

27. Schlumberger Oilfield Glossary (No longer online)

(Note: See spectrally as well.)

Definitions from Wiktionary ( ) ▸ adjective:  Of, or pertaining to, spectres; ghostly. ▸ adjective:  Of, or pertaining to, spectra; classified according to frequency or wavelength (of light etc.). Similar: ghostly, ghostlike, phantasmal, apparitional, spiritual, supernatural, spectrous, specteral, ghosten, spectralist, more... Opposite: material, physical, tangible, corporeal, solid Types: ultraviolet, infrared, visible, x-ray, gamma-ray, radio, more... Phrases: Spectral density, spectral lines, spectral line, Spectral resolution, spectral distribution, more... Adjectives: more, spatial, multi, high, different, narrow, mass, various, less, wide, certain Colors:     red,     orange,     yellow,     green,     blue, more... ▸ Words similar to spectral ▸ Usage examples for spectral ▸ Idioms related to spectral ▸ Wikipedia articles (New!) ▸ Popular nouns described by spectral ▸ Words that often appear near spectral ▸ Rhymes of spectral ▸ Invented words related to spectral