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Meaning of X-ray binary | Babel Free

Noun CEFR B2

Definitions

A binary star system in which one star of the pair is an optically invisible X-ray source.

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

X-ray crystallography X-ray diffraction X-ray fish X-ray fluorescence X-ray microscope X-ray photograph