Dictionary![]() ![]() spec'troscop'ic bi'naryAstron. a 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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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