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.