The hypothetical, ancestral proto-language from which the Dravidian languages (which include Tamil, Telugu, Kannada and Malayalam among others) are descended.

plural of proto-oncogene

An Indo-European language spoken in Scandinavia and ancestral to Old Norse that evolved from Proto-Germanic over the first centuries AD.

The hypothetical proto-language reconstructed by comparative method, from which all the Iranian languages descended.

Of or pertaining to Proto-Iranian language or people who spoke it.

Speaker of Proto-Iranian language.

(linguistics, uncountable) The hypothetical ancestor language or protolanguage of the Baltic-Finnic languages. Usually written with the UPA-transcription system.

The unattested, reconstructed common ancestor of the Vietic languages, including Vietnamese and Mường.

The reconstructed ancestor of the Armenian language.

Hypothetical prehistoric ancestor of all Eskimo languages, including Yupik and Inuit.