Hmm. The Word of the Day from Dictionary.com sounds vaguely vulgar.
lucubration \loo-kyoo-BRAY-shun; loo-kuh-\, noun:
But wait! Not at all! In fact, it would appear that Abe Lincoln practiced it!
- The act of studying by candlelight; nocturnal study; meditation.
- That which is composed by night; that which is produced by meditation in retirement; hence (loosely) any literary composition.
Okay, so the “Lincoln studying in his log cabin by candelight” story might be apocryphal, or (worse) spin, but it seems to fit the first definition.