the GNU version of the Collaborative International Dictionary of English
adj. Pertaining to, or used for, purification.
The Century Dictionary and Cyclopedia
Pertaining to purification by lustration: said of the day on which a Roman infant was purified and named.
Word Usage
"It was a matter of great pride to me, and a mark of my growing standing within the family, that I was invited to attend the lustrical, on the ninth day following the birth."