lustrālis, e, adj. 2. lustrum, relating to purification from guilt or the appeasing of the gods, lustral. Lit.: sacrificium, a sacrifice of purification, a propitiatory offering, Liv. 1, 28: aqua, lustral water, holy water, Ov. P. 3, 2, 73: exta, Verg. A. 8, 183: hostiae, App. Mag. p. 304 fin.: vota, Val. Fl. 3, 414: caput, atoning (of Iphigenia), Sen. Agam. 163.

— [V. 2. lustrum.] Of or belonging to a period of five years, quinquennial: certamen, Tac. A. 6, 4: aurum, a tax levied every five years on petty shopkeepers, usurers, and brothel-keepers: AVRI LVSTRALIS COACTOR, Inscr. Grut. 347, 4: collatio, Cod. Th. 13, tit. 1: census Romae, Ulp. Regul. 1, 8.

—Hence, subst.: lustrālis, is, m., the collector of this tax, Inscr. Fabr. p. 426, n. 458.