(adjective) : lustrālis, e, 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.

s. TLL