adjective Linguistics.
of or pertaining to the changes in a linguistic system between successive points in time; historical: diachronic analysis.
Compare synchronic.

1925–30; < French diachronique (term introduced by F. de Saussure); see dia-, chronic

diachronically, adverb
diachronicness, noun
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World English Dictionary
diachronic (ˌdaɪəˈkrɒnɪk)
Compare synchronic of, relating to, or studying the development of a phenomenon through time; historical: diachronic linguistics
[C19: from dia- + Greek khronos time]

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Word Origin & History

1857, from Gk. dia "throughout" + khronos "time." Use in linguistics dates from 1927.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

diachronic di·a·chron·ic (dī'ə-krŏn'ĭk)
Of or concerned with phenomena as they change through time.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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