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authigenic

[aw-thi-jen-ik]
adjective Geology.
  1. (of a constituent of a rock) formed in the rock where it is found.Compare allogenic(def 1).
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Origin of authigenic

1885–90; < German Authigen < Greek authigenḗs native to a specific place (aûthi there + -genēs born) + -ic; see genic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for authigenic

authigenic

adjective
  1. (of minerals) having crystallized in a sediment during or after deposition
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Word Origin for authigenic

C19: from German authigene from Greek authigenēs native + -ic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012