Source : Webster's Revised Unabridged Dictionary (1913)

Lucubration \Lu`cu*bra"tion\, n. [l. lucubratio;cf. F.
   lucubration.]
   1. The act of lucubrating, or studying by candlelight;
      nocturnal study; meditation.

            After long lucubration I have hit upon such an
            expedient.                            --Goldsmith.

   2. That which is composed by night; that which is produced by
      meditation in retirement; hence (loosely) any literary
      composition.

            Thy lucubrations have been perused by several of our
            friends.                              --Tatler.

Source : WordNet®

lucubration
     n 1: a solemn literary work that is the product of laborious
          cogitation
     2: laborious cogitation