The Collaborative International Dictionary of English v.0.48:
Orography \O*rog"ra*phy\, n. [Gr. 'o`ros, a mountain + -graphy.] That branch of science which treats of mountains and mountain systems; orology; as, the orography of Western Europe. [1913 Webster]WordNet (r) 3.0 (2006):
orography n 1: the science of mountains [syn: orology, orography]