Definition of metatony in English:
metatony
(also metatonie)
noun mɪˈtat(ə)nimɪˈtat(ə)ni
Linguistics In Baltic and Slavonic languages: change in syllabic intonation.
Origin
1930s; earliest use found in Transactions of the Philological Society. From French métatonie from méta- + -ton- + -ie.