protolinguistic
/ˌprəʊtə(ʊ)lɪŋˈɡwɪstɪk/adjective
1Designating or relating to the beginnings of language; specifically designating or relating to non-verbal means of communication from which spoken language is thought to have developed.
2Of or relating to the study of protolinguistics. rare.
Origin
1950s; earliest use found in Journal of American Folklore. From proto- + linguistic.