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Definition of Orogeny
1. Noun. The process of mountain formation (especially by the upward displacement of the earth's crust). 
Definition of Orogeny
1. the process of mountain formation [n -NIES] : OROGENIC [adj]
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1. Noun. The process of mountain formation (especially by the upward displacement of the earth's crust). 
1. the process of mountain formation [n -NIES] : OROGENIC [adj]