Slavonicism

noun2

1. •
   denoting a word or other linguistic feature borrowed from or formed under influence of Old Church Slavonic or some later Church Slavonic recension.

   • For example, a search for the modern-Serbian lexeme захвалност (gratitude) would also return and indicate examples containing the Slavonicism припознанство. — 2011
2. •
   (historical) political activities in support of Slavic cultures, languages or Eastern Orthodox religion, especially when perceived as serving irredentist pan-Slavist policies pursued by the Russian Empire.

   • It [the alliance] permitted her [Austria] to rest on the Latin races in order to push back at the same time Protestantism towards the north, and the orthodox Slavonicism in the east and south. — 1882