noun
: the production of colors that results from passing white light through an optically active substance (as quartz) that causes the amount of optical rotation to vary with the wavelength
noun
: the production of colors that results from passing white light through an optically active substance (as quartz) that causes the amount of optical rotation to vary with the wavelength
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012