Spectrum



GRE 蓝宝 Barron TOEFL 考研

解释

GRE 红宝书

• n.光谱; 范围
• ［英］ n.光谱;范围 ( a continuous sequence or range)
• ［记］ spectr ( 看) ＋um -> 看到颜色 -> 光谱
• ［例］ different opinions from all sides of the political spectrum ( 来自各个政治派别的不同意见)

Webster Collegiate

noun (plural spectra or spectrums)

• Etymology: New Latin, from Latin, appearance — more at specter
• Date: 1671
• 1.
  • a. a continuum of color formed when a beam of white light is dispersed (as by passage through a prism) so that its component wavelengths are arranged in order
  • b. any of various continua that resemble a color spectrum in consisting of an ordered arrangement by a particular characteristic (as frequency or energy): as
    • (1) electromagnetic spectrum
    • (2) radio spectrum
    • (3) the range of frequencies of sound waves
    • (4) mass spectrum
  • c. the representation (as a plot) of a spectrum
• 2.
  • a. a continuous sequence or range <a wide spectrum of interests><opposite ends of the political spectrum>
  • b. kinds of organisms associated with a particular situation (as an environment)
  • c. a range of effectiveness against pathogenic organisms <an antibiotic with a broad spectrum>

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