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orogen

[awr-uh-jen, -juh n, ohr-]
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noun Geology.
  1. an extensive belt of rocks deformed by orogeny, associated in places with plutonic and metamorphic rocks.
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Origin of orogen

< German (1921); see oro-1, -gen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018