WordReference Random House Unabridged Dictionary of American English © 2026
spec′troscop′ic bi′nary, [Astron.]
  1. Astronomya binary star having components that are not sufficiently separated to be resolved by a telescope, known to be a binary only bythe variations in wavelength of emitted light that are detected by a spectroscope. Cf. visual binary. 

'spectroscopic binary' also found in these entries (note: many are not synonyms or translations):
binary star - visual binary

Forum discussions with the word(s) "spectroscopic binary" in the title:


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