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The study of mountains.

o′ro·log′i·cal (ôr′ə-lŏj′ĭ-kəl) adj.
o′ro·log′i·cal·ly adv.
o·rol′o·gist n.
References in periodicals archive ?
It may continue for four to five more days and spread in more areas, mete orologist Arif Hossain said.
An inventor known only as Robert the Englishman (probably borrowing from Arab treatises) wrote about attempts to devise an astronomical clock in 1271, and a monk called Bartholemew was described as an 'orologist' at St Paul's Cathedral in 1286.