411 REFERENCE · Wiktionary
Duchenne smile
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
thumb|A Duchenne smile
Etymology
Named after the French physician Guillaume Duchenne de Boulogne (1806–1875) who identified it.
Noun
A smile involving contraction of both the zygomatic major muscle (which raises the corners of the mouth) and the orbicularis oculi (which raises the cheeks and forms crow's feet around the eyes).
en Botox smile Pan Am smile
en eponyms