Late 19th century; earliest use found in The New Sydenham Society's Lexicon of Medicine and the Allied Sciences. From meso- + -gnathism, after mesognathous.
Definition of mesognathism in US English:
mesognathism
noun
Anthropology rare
The fact or condition of being mesognathous.
Origin
Late 19th century; earliest use found in The New Sydenham Society's Lexicon of Medicine and the Allied Sciences. From meso- + -gnathism, after mesognathous.