Spectrum is the range of colors of wavelength energy sent out from a light source when viewed through a prism.(noun)
An example of a spectrum is a rainbow.
Spectrum is a broad range of related ideas, qualities or activities.(noun)
An example of a spectrum is a group of activities used for teaching someone how to play basketball.
See spectrum in Webster's New World College Dictionary
Origin: ModL, special use (by Sir Isaac Newton, 1671) of L spectrum: see specter
See spectrum in American Heritage Dictionary 4
noun pl. spec·tra (-trə) or spec·trums
Origin: Latin, appearance
Origin: , from specere, to look at; see spek- in Indo-European roots.
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