A moustache is facial hair grown on the outer surface of the upper lip. It may or may not be accompanied by a type of beard, a facial hair style grown and cropped to cover most of the lower half of the face. The word "moustache" derives from 16th century French moustache, which in turn is derived from the Italian mostaccio (14th century), dialectal mustaccio (16th century), from Medieval Latin mustacium (8th century), Medieval Greek moystakion (moustakion), attested in the 9th century, which ultimately originates as a diminutive of Hellenistic Greek mysta3 (mustax, mustak-), meaning "upper lip" or "facial hair", probably derived from Hellenistic Greek myllon (mullon), "lip". Shaving with stone razors was technologically possible from Neolithic times, but the oldest portrait showing a shaved man with a moustache is an ancient Iranian (Scythian) horseman from 300 BC.
Contributions by 220.127.116.11, Lumos3, and Whiskers.