Slavonic-Serbian (славяносербскій, slavyanoserbski), Slavo-Serbian, or Slaveno-Serbian (славено-сербскiй, slaveno-serbski; [славеносрпски/slavenosrpski] error: {{lang-xx}}: text has italic markup (help)) was a literary language used by the Serbs in the Habsburg Empire, mostly in what is now Vojvodina, from the mid-18th century to the first decades of the 19th century. It was a linguistic blend of Church Slavonic of the Russian recension, vernacular Serbian (Štokavian dialect), and Russian.
At the beginning of the 18th century, the literary language of the Serbs was the Serbian recension of Church Slavonic (also called Serbo-Slavonic), with centuries-old tradition. After the Great Serb Migration of 1690, many Serbs left Ottoman-held territories and settled in southern areas of the Kingdom of Hungary in the Habsburg Empire, mostly in what is now Vojvodina. The Serbian Orthodox Church in these areas was in need of liturgical books, and the Serbian schools were in need of textbooks. The Habsburg court, however, did not allow the Serbs to establish their printing presses. The Serbian Church and schools received ample help in books and teachers from the Russian Empire. By the mid-18th century, Serbo-Slavonic had been mostly replaced with Russo-Slavonic (Russian recension of Church Slavonic) as the principal literary language of the Serbs.