Definition of mystacial in English:

mystacial

adjective

(also mystachial)
Zoology
  • Relating to or situated on the upper lip; = moustachial .

Pronunciation

mystacial

/mɪˈsteɪʃl/ /mɪˈsteɪsɪəl/

Origin

Late 18th century. From ancient Greek μυστακ-, μύσταξ moustache + -ial.