The Collaborative International Dictionary
Petasus
Petasus \Pet"a*sus\, n. [L., from Gr. ?.] (Gr. & Rom. Antiq.) The winged cap of Mercury; also, a broad-brimmed, low-crowned hat worn by Greeks and Romans.
Wiktionary
petasus
n. (context historical English) A broad-brimmed, low-crowned hat worn by the Ancient Greeks and Romans.
Usage examples of "petasus".
I commissioned him to make for me various pairs of indoor sandals, street shoes latcheted in the Scythian manner and a petasus hat for winter wear.
Greek petasus, admirably adapted for concealment as well as protection.
His petasus is slung at his back, meaning that the clouds are not yet opened or expanded in the sky.