The Collaborative International Dictionary of English v.0.48:

Handiwork \Hand"i*work`\ (-[i^]*w[^u]rk`), n. [OE. handiwerc,
   AS. handgeweorc; hand hand + geweorc work; prefix ge- +
   weorc. See Work.]
   Work done by the hands; hence, any work done personally.
   [1913 Webster]

         The firmament showeth his handiwork.     --Ps. xix. 1.
   [1913 Webster]

WordNet (r) 3.0 (2006):

handiwork
    n 1: a work produced by hand labor [syn: handicraft,
         handcraft, handiwork, handwork]