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spectrum

spec·trum

spectrum

 
 
pronunciation:
spek trm
features:
Word Explorer, Word Parts
part of speech: noun
inflections: spectra, spectrums
definition: a band of colors that is formed when light is passed through a prism, or in some other way. The six colors of a spectrum are red, orange, yellow, green, blue, and purple.
A rainbow is one kind of spectrum that is formed when sunlight passes through rain.
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  color, light