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  1. spectrum

    • IPA[ˈspɛktrəm]

    英式

    • n.
      a band of colours, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.;the entire range of wavelengths of electromagnetic radiation.
    • noun: spectrum, plural noun: spectra

    • 釋義
    • 相關詞
    • 片語

    名詞

    • 1. a band of colours, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.
    • the entire range of wavelengths of electromagnetic radiation.
    • a characteristic series of frequencies of electromagnetic radiation emitted or absorbed by a substance.
    • the components of a sound or other phenomenon arranged according to such characteristics as frequency, charge, and energy.
    • 2. used to classify something in terms of its position on a scale between two extreme points the left or the right of the political spectrum
    • a wide range self-help books are covering a broader and broader spectrum
    • plural form of spectrum

    Oxford Dictionary

    • plural form of spectrum

    Oxford American Dictionary

    • n.
      an emission spectrum consisting of separate isolated lines.

    Oxford Dictionary

    • n.
      an emission spectrum consisting of separate isolated lines.

    Oxford American Dictionary

    • n.
      a spectrum of the electromagnetic radiation emitted by a source.

    Oxford Dictionary

    • n.
      the range of wavelengths or frequencies over which electromagnetic radiation extends.

    Oxford American Dictionary

    • adj.
      denoting antibiotics, pesticides, etc. effective against a large variety of organisms: pretreatment with broad-spectrum antibiotics

    Oxford Dictionary

    • n.
      a distribution of ions shown by the use of a mass spectrograph or mass spectrometer.

    Oxford American Dictionary

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    • IPA[ˈspektrəm]

    美式

    • n.
      a band of colors, as seen in a rainbow, produced by separation of the components of light by ...

    Oxford American Dictionary