transcription, транскрипция: [ combining form ]
or proto-
Etymology: Greek prōt-, prōto-, from prōtos; akin to Greek pro before — more at for
1.
a. : first in time
proto history
b. : beginning : giving rise to
proto planet
2. : parent substance of a (specified) substance
prot actinium
3. : first formed : primary
proto xylem
4. capitalized : relating to or constituting the recorded or assumed language that is ancestral to a language or to a group of related languages or dialects
Proto- Indo-European