proto-form

[ proh-toh-fawrm ]
/ ˈproʊ toʊˌfɔrm /

noun Linguistics.

a hypothetical linguistic form reconstructed as an element of a protolanguage.

Origin of proto-form

First recorded in 1960–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019