Meaning

noun a chest in which coins from the mint are held to await assay

noun any receptacle in which wafers for the Eucharist are kept

originThe noun is derived from Late Middle English pix, pixe (“vessel for holding a host, pyx; hip bone socket, pyxis”) [and other forms], from Late Latin pyxis (“vessel for holding a host”), Latin pyxis (“small box for medicines or toiletries; box holding sample coins for testing; hip bone socket; sailor's compass”), from Koine Greek πυξίς (puxís), Ancient Greek πῠξῐ́ς (pŭxĭ́s, “box; box or tablet…

Etymology from Wiktionary, CC BY-SA 3.0