noun plural but usually singular in construction
: a branch of optics that deals with the description and explanation of all optical phenomena in terms of physical theories (as undulatory theory, electromagnetic phenomena, or quantum mechanics)
noun plural but usually singular in construction
: a branch of optics that deals with the description and explanation of all optical phenomena in terms of physical theories (as undulatory theory, electromagnetic phenomena, or quantum mechanics)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012