1. 
[syn: pyxidium, pyxis]
2.  a constellation in the southern hemisphere near Puppis and Antlia; 
3.  a small box used by ancient Greeks to hold medicines; 
The Collaborative International Dictionary of English v.0.48:
Pyxis \Pyx*is\, n. [L.]
   1. A box; a pyx.
      [1913 Webster]
   2. (Bot.) A pyxidium.
      [1913 Webster]
   3. (Anat.) The acetabulum. See Acetabulum, 2.
      [1913 Webster]
WordNet (r) 3.0 (2006):
pyxis
    n 1: fruit of such plants as the plantain; a capsule whose upper
         part falls off when the seeds are released [syn:
         pyxidium, pyxis]
    2: a constellation in the southern hemisphere near Puppis and
       Antlia
    3: a small box used by ancient Greeks to hold medicines