X-UNIT
Meaning of X-UNIT in English
/eks"yooh'nit/ , n.
a unit formerly used to express the wavelength of x-rays and gamma rays, equal to approximately 10 -11 cm. Abbr.: Xu, XU
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012