noun Etymology: Latin ~-, lucubratio study by night, work produced at night, from lucubrare to work by lamplight; akin to Latin luc-, lux Date: 1595 laborious or intensive study
LUCUBRATION
Meaning of LUCUBRATION in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012