Definition: To work, write, or study laboriously, especially at night.
Definition: To write learnedly.
1. He gives me to understand that you chew various cuds of reflection; that you lucubrate ominously day and night. — Skeeters Kir: a novel, Edgar Lee Masters
2. Nature designed that I should lucubrate for the high-heeled sock; managers have resolved that I shall scribble for the low-heeled buskin. — Tragic Case of a Common Writer, Charles Dickens