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ALL meanings of x-unit

x-u·nit
X x
  • noun x-unit a unit formerly used to express the wavelength of x-rays and gamma rays, equal to approximately 10− 11 cm. Abbreviation: Xu, XU. 1
  • noun x-unit a unit of length equal to 0.100 202 × 10–12 metre, for expressing the wavelengths of X-rays and gamma rays 0
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