Etymology: Middle English, from Medieval Latin pyxis, which transliterates the Greek, pyxis, box-wood receptacle, from pyxos, box-tree
Date: 15th century
1 : a container for the reserved host; especially : a small round metal receptacle used to carry the Eucharist to the sick
2 : a box used in a mint for deposit of sample coins reserved for testing weight and fineness
Pastor Paul knew that times were changing but still...a Pyrex pyx for the precious host? Positively mortifying!
For the curious:
The Trial of the Pyx
A medieval pyx