The Collaborative International Dictionary of English v.0.48:

oenology \oe*nol"o*gy\, n. [Gr. ? wine + -logy.]
   Knowledge of wine, scientific or practical.
   [1913 Webster]

WordNet (r) 3.0 (2006):

oenology
    n 1: the art of wine making [syn: enology, oenology]