unit of length equal to a hundred-millionth of a centimeter (used to measure the wavelengths of light)
A.U.
Meaning of A.U. in English
Explanatory English dictionary bed edition. Толковый словарь английского языка Редакция bed. 2012
unit of length equal to a hundred-millionth of a centimeter (used to measure the wavelengths of light)
Explanatory English dictionary bed edition. Толковый словарь английского языка Редакция bed. 2012