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Noun: X-ray astronomy
  1. (astronomy) an observational branch of astronomy, which deals with the study of X-ray emission

Encyclopedia: X-ray astronomy

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xlviii
Xmas
XML
XOR circuit
X-OR circuit
XOR gate
X-radiation
X-rated
x-ray
X-ray
X-ray astronomy
X-ray crystallography
X-ray diffraction
X-ray film
X-ray machine
X-ray photograph
X-ray photography
X-ray picture
X-ray therapy
X-ray tube
X-raying