protolanguage

noun
pro·​to·​lan·​guage | \ ˈprō-tō-ˌlaŋ-gwij How to pronounce protolanguage (audio) \

Definition of protolanguage

: an assumed or recorded ancestral language

First Known Use of protolanguage

1948, in the meaning defined above

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The first known use of protolanguage was in 1948

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