lustrĭcus, a, um, adj. [2. lustrum], of or belonging to purification: dies, the eighth (or ninth) day after a child’s birth, on which it was purified by a sacrifice and received a name, Suet. Ner. 6; Macr. S. 1, 16; Arn. 3, 102; cf.: lustrici dies infantium appellantur, puellarum octavus, puerorum nonus, qui his lustrantur atque eis nomina imponuntur, Paul. ex Fest. p. 120 Müll.