sacrament: A rite established by Jesus Christ to bring grace to those participating in or receiving it. The seven sacraments of Catholicism are Baptism, Penance, Confirmation, Holy Eucharist, Matrimony, Holy Orders, and Anointing of the Sick.

seminarian: A student training for the priesthood.

seminary: The equivalent of Protestant divinity school where men are trained for the priesthood.

sign of the cross: A gesture of respect in which a Catholic uses the right hand to touch the forehead, then the middle of the breast, then the left shoulder, and finally the right shoulder.