glottochronology

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Definitions from WordNet

Noun glottochronology has 1 sense

glottochronology - the determination of how long ago different languages evolved from a common source language; "he mapped the glottochronology of the Romance languages"
--₁ is a kind of chronology

Definitions from the Web

Glottochronology

Part of speech: Noun

Sense 1: The study of the rate of change occurring in the vocabularies of languages over time, used to estimate the divergence date between two related languages.

Sample sentence: Glottochronology allows linguists to estimate the approximate time when two languages separated from a common ancestor.

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