Psiloi

right|thumb|280px|Macedonian battle formation with psiloi at the fore, courtesy of The Department of History, United States Military Academy.

In Ancient Greek armies, the psiloi (Ancient Greek , singular ψιλός, psilos, literally "bare, stripped") were light infantry who typically served as skirmishers and missile troops. They were distinguished from the armored hoplitai (heavy infantry) by their light weaponry and lack of armor.