What's the difference between ptyxis and pyxis?

Ptyxis

Definition:

• (n.) The way in which a leaf is sometimes folded in the bud.

Example Sentences:

Pyxis

Definition:

• (n.) A box; a pyx.
• (n.) A pyxidium.
• (n.) The acetabulum. See Acetabulum, 2.

Example Sentences:

• (1) The Pyxis Medstation system was implemented on two nursing units at a 1000-bed tertiary-care referral hospital.