Slavonic

[sluh-von-ik] /sləˈvɒn ɪk/
adjective
1.
Slavonian.
2.
Slavic.
Origin
1605-15; < New Latin slavonicus, equivalent to Medieval Latin Slavon(ia) + -icus -ic
Related forms
Slavonically, adverb
British Dictionary definitions for Slavonic

Slavonic

/sləˈvɒnɪk/
noun
1.
a branch of the Indo-European family of languages, usually divided into three subbranches: South Slavonic (including Old Church Slavonic, Serbian, Croatian, Bulgarian, Bosnian, etc), East Slavonic (including Ukrainian, Russian, etc), and West Slavonic (including Polish, Czech, Slovak, etc)
2.
the unrecorded ancient language from which all of these languages developed
adjective
3.
of, denoting, or relating to this group of languages
4.
of, denoting, or relating to the people who speak these languages
Word Origin
C17: from Medieval Latin Slavonicus, Sclavonicus, from Slavonia