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(Linguistics) (functioning as singular) the statistical study of the vocabulary of a language, with special attention to the historical links with other languages. See also glottochronology
lex•i•co•sta•tis•tics(ˌlɛk sɪ koʊ stəˈtɪs tɪks)
n. (used with a sing. v.)
the statistical study of the vocabulary of a language or languages for historical purposes.
the study of languages and their vocabularies by statistical methods for historical purposes. Cf. glottochronology. — lexicostatistic, lexicostatistical, adj.See also: Linguistics