Source : Webster's Revised Unabridged Dictionary (1913)

Lucubrate \Lu"cu*brate\, v. i. [imp. & p. p. {Lucubrated}; p.
   pr. & vb. n. {Lucubrated}.] [L. lucubratus, p. p. of
   lucubrare to work by lamplight, fr. lux light. See {Light},
   n.]
   To study by candlelight or a lamp; to study by night.

Lucubrate \Lu"cu*brate\, v. i. [imp. & p. p. {Lucubrated}; p.
   pr. & vb. n. {Lucubrated}.] [L. lucubratus, p. p. of
   lucubrare to work by lamplight, fr. lux light. See {Light},
   n.]
   To study by candlelight or a lamp; to study by night.