Defn: Effort to overcome in contest; struggle; endeavor. [R.]
Farindon.

LUCTUAL Luc"tu*al, a. Etym: [L. luctus mourning, sorrow, fr. lugere, fr. luctum, to mourn.]

Defn: Producing grief; saddening. [Obs.] Sir G. Buck.

LUCUBRATE
Lu"cu*brate, v. i. [imp. & p. p. Lucubrated; p. pr. & vb. n.
Lucubrated.] Etym: [L. lucubratus, p. p. of lucubrare to work by
lamplight, fr. lux light. See Light, n.]

Defn: To study by candlelight or a lamp; to study by night.

LUCUBRATE
Lu"cu*brate, v. t.

Defn: To elaborate, perfect, or compose, by night study or by laborious endeavor.

LUCUBRATION
Lu`cu*bra"tion, n. Etym: [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.