Antelucanus, A diectiuum. pen. prod. That is before day.Antelucanæ cœnæ.Cic.Vnseasonable suppers from euening vntill day.Antelucana industria.Cic.Antelucana lucubratio. Col. Antelucana officia. Plin. Ex antelucano rempore.Cic.Before day breaking.Antelucani venti.Windes that doe blowe from the water, or from some creeke.Anteluculo.Before day: an houre before sunne.
Lewis and Short: Latin dictionary
antĕ-lūcānus, a, um, adj. [lux], before light, before day (class.; only in prose): ex antelucano tempore, Cic. Fam. 15, 4: gutta roris antelucani, Vulg. Sap. 11, 23: industria, Cic. Tusc. 4, 19, 44: cenae,
which continue the whole night until daybreak
, id. Cat. 2, 10: lucubratio, Col. 11, 2, 55: spiritus, i. e. ventus, Vitr. 1, 6; so, aurae, Plin. 18, 6, 7, 2.—Hence, subst.: antĕlūcā-num, i, n., the dawn (eccl. Lat.): doctrinam quasi antelucanum illumino omnibus, I make to shine as the dawn, Vulg. Eccli. 24, 44.