Definition of visual binary in English:

visual binary

Syllabification: vis·u·al bi·na·ry

noun

Astronomy
  • A binary star of which the components are sufficiently far apart to be resolved by an optical telescope.
    More example sentences
    • These were visual binaries - stars that could be resolved by eye using a good instrument.
    • These spectroscopic binary stars are generally much closer to each other than visual binaries, as close as a few hundredths of an astronomical unit.
    • Sirius is a visual binary, and with her two different eyes, it could be cool.

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Pronunciation: kəːf
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a slit made by cutting with a saw