Source : Webster's Revised Unabridged Dictionary (1913)

Alpist \Al"pist\, Alpia \Al"pi*a\, n. [F.: cf. Sp. & Pg.
   alpiste.]
   The seed of canary grass ({Phalaris Canariensis}), used for
   feeding cage birds.

Source : WordNet®

Phalaris canariensis
     n : Canary Islands grass; seeds used as feed for caged birds
         [syn: {canary grass}, {birdseed grass}]