Source : Webster's Revised Unabridged Dictionary (1913)

Apiece \A*piece"\, adv. [Pref. a- + piece.]
   Each by itself; by the single one; to each; as the share of
   each; as, these melons cost a shilling apiece. ``Fined . . .
   a thousand pounds apiece.'' --Hume.

Source : WordNet®

apiece
     adv : to or from every one of two or more (considered
           individually); "they received $10 each" [syn: {each}, {to
           each one}, {for each one}, {from each one}]