Late 19th century; earliest use found in Journal of the Royal Anthropological Institute. From French nasion from classical Latin nāsus nose + French -ion.
Definition of nasion in US English:
nasion
nounˈneɪzɪən
Anatomy Anthropology
The centre of the frontonasal suture.
Origin
Late 19th century; earliest use found in Journal of the Royal Anthropological Institute. From French nasion from classical Latin nāsus nose + French -ion.