noun plural but singular in construction Date: 1579 a science that deals with the genesis and propagation of light, the changes that it undergoes and produces, and other phenomena closely associated with it
OPTICS
Meaning of OPTICS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012