D defs.my
Entry 1 sense Webster, 1913

Petasus

· Pet·a·sus · IPA /ˈpɛtəsəs/
01 n. The winged cap of Mercury; also, a broad-brimmed, low-crowned hat worn by Greeks and Romans.
  1. 1.
    The winged cap of Mercury; also, a broad-brimmed, low-crowned hat worn by Greeks and Romans.(Gr. & Rom. Antiq.)