pax
A small tablet, having on it a representation of the crucifixion, or some other Christian symbol, which was offered to the congregation to be kissed during the celebration of the mass: it was introduced when the osculum pacis, or kiss of peace, was abrogated on account of the confusion which it entailed. It was usually of silver or other metal, with a handle at the back, but was occasionally of other materials; sometimes it was enamelled and set with precious stones. (Parker, 1896)