Physics.
a measure of the effectiveness of a material in absorbing nuclear radiation, expressed as the thickness of an air layer (at 0° C and 1 atmosphere) causing the same absorption.
Physics.
a measure of the effectiveness of a material in absorbing nuclear radiation, expressed as the thickness of an air layer (at 0° C and 1 atmosphere) causing the same absorption.
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012