The Collaborative International Dictionary
Elucubrate
Elucubrate \E*lu"cu*brate\, v. i. [L. elucubratus, p. p. of
elucubrare to compose by lamplight.]
See Lucubrate. [Obs.]
--Blount.
Wiktionary
elucubrate
vb. To solve, write or compose by working studiously at night; to study.