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[aw-roj-uh-nee, oh-roj-] /ɔˈrɒdʒ ə ni, oʊˈrɒdʒ-/

noun, Geology.
the process of mountain making or upheaval.
the formation of mountain ranges by intense upward displacement of the earth’s crust, usually associated with folding, thrust faulting, and other compressional processes

“mountain forming,” 1890, from French orogénie; see oro- + -geny. Related: Orogenic.
orogeny (ô-rŏj’ə-nē) also orogenesis
The process of mountain formation, especially by folding and faulting of the Earth’s crust and by plastic folding, metamorphism, and the intrusion of magmas in the lower parts of the lithosphere. Unlike epeirogeny, orogeny usually affects smaller regions and is associated with evidence of folding and faulting. The long chains of mountains often seen on the edges of continents form through orogeny.


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  • Orographic-precipitation

    noun 1. precipitation caused by the lifting of moist air over a mountain barrier.

  • Oroide

    [awr-oh-ahyd, ohr-] /ˈɔr oʊˌaɪd, ˈoʊr-/ noun 1. an alloy containing copper, tin, etc., used to imitate gold. /ˈɔːrəʊˌaɪd/ noun 1. an alloy containing copper, tin, and other metals, used as imitation gold

  • Orography

    [aw-rog-ruh-fee, oh-rog-] /ɔˈrɒg rə fi, oʊˈrɒg-/ noun 1. the branch of physical geography dealing with mountains. /ɒˈrɒɡrəfɪ/ noun 1. the study or mapping of relief, esp of mountains

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