[1] : WordNet (r) 2.0

radio-frequency spectrum
     n : the entire spectrum of electromagnetic frequencies used for
         communications; includes frequencies used for radio and
         radar and television syn: radio spectrum
see also:
radio spectrum 

Spectrum >> S Words
Spectrum, definition of term: Spectrum
spectrum_pag1.html

Radio Spectrum >> R Words
Radio Spectrum, definition of term: Radio Spectrum
radio+spectrum_pag1.html

Color Spectrum >> C Words
Color Spectrum, definition of term: Color Spectrum
color+spectrum_pag1.html