Proper noun
Proto-Balto-Slavic
(linguistics) The hypothetical ancestor language or protolanguage of Baltic and Slavic languages, descending from Proto-Indo-European.
This would imply that Proto-Baltic, the last common ancestor of all Baltic languages, would be identical to Proto-Balto-Slavic itself, rather than distinct from it. Source: Internet
The most linguistically well-grounded and widely accepted is from the Proto-Balto-Slavic root *mŭzg-/muzg- from the Proto-Indo-European *meu- "wet", (Russian) main citation citation so the name Moskva might signify a river at a wetland or a marsh. Source: Internet
There has been no agreement regarding which archeological formation such hypothetical Proto-Balto-Slavic community would correspond to. Source: Internet