The Collaborative International Dictionary of English v.0.48:

Poa \Po"a\, n. [NL., fr. Gr. ? grass.] (Bot.)
   A genus of grasses, including a great number of species, as
   the kinds called meadow grass, Kentucky blue grass, June
   grass, and spear grass (which see).
   [1913 Webster]

WordNet (r) 3.0 (2006):

Poa
    n 1: chiefly perennial grasses of cool temperate regions [syn:
         Poa, genus Poa]

The Free On-line Dictionary of Computing (19 January 2023):

Portable Object Adapter
POA

    (POA) Part of the CORBA architecture.

   [Details?]

   (2004-06-23)