n.
Pronunciation: ˌ lü-ky ə - ' br ā -sh ə n, ˌ lü-k ə -
Function: noun
Etymology: Latin lucubration-, 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 also : the product of such study ― usually used in plural