designating or of a proposed language superfamily that includes the Indo-European, Afroasiatic, Dravidian, Uralic, and Altaic families
noun
this superfamily of languages
See Nostratic in American Heritage Dictionary 4
(nə-strătˈĭk)
noun
A hypothetical language proposed as the parent language of Afro-Asiatic, Altaic, Dravidian, Indo-European, Kartvelian, Uralic-Yukaghir, and perhaps other language families.