diachrony

noun
di·ach·ro·ny | \dī-ˈa-krə-nē \

Definition of diachrony 

1 : diachronic analysis

2 : change extending through time

First Known Use of diachrony

circa 1939, in the meaning defined at sense 1

History and Etymology for diachrony

International Scientific Vocabulary dia- + -chrony (as in synchrony)

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The first known use of diachrony was circa 1939

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