English
prognathous
From pro- + -gnathous.
Formed from pro + gnathous
Proto-Indo-European *pró ‘toward’
Proto-Indo-European *próh₁
Proto-Italic *prō
Latin prō ‘on behalf of’
Middle English pro ‘advantage’
English pro
Today it means
adj Having a jaw that projects forward more than is usual, or being such a jaw.
Language periods are conventional ranges, not dates for this word.
Etymograph / prognathous