A pyx is a storage container for Communion wafers, which is often stored in a tabernacle. There is another type of pyx that is used to hold the ashes for the Ash Wednesday service.
The term reverend is an adjective that simply indicates that a person is a member of the clergy. It is not an office in and of itself, but merely a title of educational and ecclesiastical status. Most Pastors are Reverends, but not all Reverends are Pastor. The term “Reverend Father” is the same as saying “Pastor.”
Rubrics are written directions for liturgical actions found in religious service and liturgical books, especially in Christianity. They are traditionally printed or written in red, thus the name from the Latin ruber, to distinguish them from the words that are supposed to be spoken, which are printed in black.
Rubrics may also refer to any liturgical action customarily performed over the course of a service whether or not they are actually written down.
In historic church architecture, the sacristy is the room or closet in which communion equipment, linen, and supplies are kept. It is usually equipped with a sink.