Definition of Proto-Indo-European noun from the Oxford Advanced American Dictionary

 

Proto-Indo-European

 noun
noun
 
[uncountable]
 
jump to other results
the ancient language on which all Indo-European languages are thought to be based. There are no written records of Proto-Indo-European, but experts have tried to construct it from the evidence of modern languages.
See the Oxford Advanced Learner's Dictionary entry: Proto-Indo-European