Pilos

(1) felt cap; (2) metal helmet shaped like a pilos (GR).
Found on http://s_van_dorst.tripod.com/Ancient_Warfare/Greece/greek_glossary.html

pilos

(from the article `pileus`) close-fitting, brimless hat worn by the ancient Romans and copied from the Greek sailor`s hat called the pilos. In Roman times the head was ...
Found on http://www.britannica.com/eb/a-z/p/68
No exact match found