n. (在灯下)刻苦钻研, 冥思苦想

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.