Source : Webster's Revised Unabridged Dictionary (1913)

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).

Source : WordNet®

Poa
     n : chiefly perennial grasses of cool temperate regions [syn: {genus
         Poa}]