You searched for: “lucubration”
lucubration (s) (noun), lucubrations (pl)
1. A written work resulting from prolonged study, often having a scholarly style.
2. Long hard study; especially, at night.
3. Etymology: from Latin lucubro, "to study by candle-light", from lucubrum, from lux, "light".
This entry is located in the following units: -ation, -ization (-iz[e] + -ation); -isation (British spelling variation) (page 60) luco-, luc-, luci-, lux, -lucence, -lucent (page 3)