spectral type

spectral class

n (Astronomy) any of various groups into which stars are classified according to characteristic spectral lines and bands. The most important classification (Harvard classification) has a series of classes O, B, A, F, G, K, M, the series also being a scale of diminishing surface temperature

spec′tral type′

n. a category for classifying a star according to features of its spectrum that indicate its surface temperature and chemical composition. [1920–25]

spectral type

[′spek·trəl ‚tīp] (astronomy) A label used to indicate the physical and chemical characteristics of a star as indicated by study of the star's spectra; for example, the stars in the spectral type known as class B are blue-white, and are referred to as helium stars because the dominant lines in their spectra are the lines in helium spectra.

单词	spectral type
释义	spectral type spectral type or spectral class n (Astronomy) any of various groups into which stars are classified according to characteristic spectral lines and bands. The most important classification (Harvard classification) has a series of classes O, B, A, F, G, K, M, the series also being a scale of diminishing surface temperature spec′tral type′ n. a category for classifying a star according to features of its spectrum that indicate its surface temperature and chemical composition. [1920–25] spectral type spectral type [′spek·trəl ‚tīp] (astronomy) A label used to indicate the physical and chemical characteristics of a star as indicated by study of the star's spectra; for example, the stars in the spectral type known as class B are blue-white, and are referred to as helium stars because the dominant lines in their spectra are the lines in helium spectra.
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