noun Date: 1953 a linguistic method that uses the rate of vocabulary replacement to estimate the date of divergence for distinct but genetically related languages, glottochronological adjective
GLOTTOCHRONOLOGY
Meaning of GLOTTOCHRONOLOGY in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012