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Meaning of diachronic

di•a•chron•ic

Pronunciation: (dī"u-kron'ik), [key]
— adj. Ling.
  1. of or pertaining to the changes in a linguistic system between successive points in time; historical:Cf. synchronic. diachronic analysis.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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