Part of speech: noun

An image formed by rays of light refracted, as through a prism, displaying the colors of the rainbow.

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Usage examples "spectrum":

  1. But still it was believed that yellow and blue would make a green, though not that of the spectrum. - "Five of Maxwell's Papers", James Clerk Maxwell.
  2. That is, we take into account not only the energy distribution in the spectrum of the light but also the fact that different wave- lengths of an equal energy spectrum affect our eye very differently. - "The Nature of Animal Light", E. Newton Harvey.
  3. In the spectrum blue merges into green, red into yellow, and though we invent names for various tints, others still escape classification. - "The Principles of English Versification", Paull Franklin Baum.