spectrum

UK /ˈspektrəm/US /ˈspektrəm/

Meaning

noun

a band of coloured lights in order of their wavelengths, as seen in a rainbow and into which light may be separated

“A spectrum is formed by a ray of light passing through a prism.”

Watch TED / YouTube close-reading lessons, tap any word, and review with built-in spaced repetition.