English

propalinal

From pro- + palinal.

Proto-Indo-European *pér ‘through’

Proto-Indo-European *pró ‘forwards, before’

Proto-Italic *prō ‘in front of, before’

Latin prō ‘in favor of, on behalf of’

English pro-

Ancient Greek

Today it means

adj Moving backward and forward, as the underjaw does during mastication.

Language periods are conventional ranges, not dates for this word.

Etymograph / propalinal