bap·tism /ˈbæpˌtɪzəm, ||ˈbæb-/
Bap·tism n. The act of baptizing; the application of water to a person, as a sacrament or religious ceremony, by which he is initiated into the visible church of Christ. This is performed by immersion, sprinkling, or pouring.
n : a Christian sacrament signifying spiritual cleansing and
rebirth; "most churches baptize infants but some insist
on adult baptism"