Baptism is a rite admitting a person to the Christian Church by the symbolic
application of water to the head. It is considered as a sacrament by most confessions.
If you want to find out more about baptism feel free to follow the link.
Bibliography:
Blakemore, Colin; Jennet, Shelia. "baptism." The Oxford Companion to the Body. 2001. Encyclopedia.com. 06 Oct. 2013 <http://www.encyclopedia.com>.