Jisho

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Noun
1. spectrumPhysics, From French “spectre”
Wikipedia definition
2. SpectrumA spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary infinitely within a continuum. The word saw its first scientific use within the field of optics to describe the rainbow of colors in visible light when separated using a prism; it has since been applied by analogy to many fields other than optics. Thus, one might talk about the spectrum of political opinion, or the spectrum of activity of a drug, or the autism spectrum.
Read “Spectrum” on English Wikipedia
Read “スペクトル” on Japanese Wikipedia
Read “Spectrum” on DBpedia

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