absorption coefficient

absorption coefficient汉语翻译：
【化】 吸收系数; 吸光系数; 光谱吸光系数
【医】 吸收系数, 本生氏吸收系数英语解释：
名词 absorption coefficient:

a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber同义词：coefficient of absorption, absorptance