noun ·same·as pyxis.
2. pyx ·noun the box in which the compass is suspended; the binnacle.
3. pyx ·noun the box, case, vase, or tabernacle, in which the host is reserved.
4. pyx ·vt to test as to weight and fineness, as the coins deposited in the pyx.
5. pyx ·noun a box used in the british mint as a place of deposit for certain sample coins taken for a trial of the weight and fineness of metal before it is sent from the mint.