Byelorussian
or Be·lo·rus·sian
[ byel-oh-ruhsh-uh n, bel-oh- ]
/ ˌbyɛl oʊˈrʌʃ ən, ˌbɛl oʊ- /
adjective
of or relating to Byelorussia, its people, or their language.
noun
a native or inhabitant of Byelorussia.
an East Slavic language, spoken by the inhabitants of Byelorussia and written in the Cyrillic alphabet.
Compare Slavic(def 1).