ostension

Etymology
Borrowed from, in turn from.

Noun

 * 1)  The act of presenting an ostensive definition.
 * 2)  An act of showing or demonstrating.
 * 3)  The showing of the sacrament on the altar in order that it may receive the adoration of the communicants.
 * 1)  The showing of the sacrament on the altar in order that it may receive the adoration of the communicants.