spec·trum 
/ˈspɛktrəm/ noun
plural spec·tra /ˈspɛktrəm/ noun /ˈspɛktrə/ or spec·trums [count] 1 a : the group of colors that a ray of light can be separated into including red, orange, yellow, green, blue, indigo, and violet : the colors that can be seen in a rainbow
▪ beautiful scarves in all the colors of the spectrum
b technical : an entire range of light waves, radio waves, etc. 2 : a complete range of different opinions, people, etc.
▪ reaching voters across the political spectrum [=voters with all the different political beliefs that people have] — often + of ▪ the whole spectrum of emotions ▪ The city's populations represent a broad/wide spectrum of society.
▪ beautiful scarves in all the colors of the spectrum
b technical : an entire range of light waves, radio waves, etc.
▪ reaching voters across the political spectrum [=voters with all the different political beliefs that people have] — often + of ▪ the whole spectrum of emotions ▪ The city's populations represent a broad/wide spectrum of society.
