The Collaborative International Dictionary of English v.0.48:

Pomology \Po*mol"o*gy\, n. [L. pomum fruit + -logy: cf. F.
   pomologie.]
   The science of fruits; a treatise on fruits; the cultivation
   of fruits and fruit trees.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pomology
    n 1: the branch of botany that studies and cultivates fruits