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Bal·to-Slav·ic | \ ˌbȯl-(ˌ)tō-ˈslä-vik 
, -ˈsla- \
, -ˈsla- \Definition of Balto-Slavic
: a subgroup of Indo-European languages consisting of the Baltic and the Slavic branches — see Indo-European Languages Table
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Time Traveler for Balto-Slavic
The first known use of Balto-Slavic was in 1889
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