Also found in: Encyclopedia, Wikipedia.
pet·a·sosor pet·a·sus (pĕt′ə-səs)
1. A wide-brimmed hat worn by ancient Greeks and Romans.
2. Greek Mythology The winged hat of Hermes.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Historical Terms) a broad-brimmed hat worn by the ancient Greeks, such as one with wings on either side as traditionally worn by Mercury
[C16: via Latin from Greek petasos]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
pet•a•sus(ˈpɛt ə səs)
n., pl. -sus•es.
a broad-brimmed hat worn by ancient Greeks, often represented as a winged hat worn by Hermes.
[1590–1600; < Latin < Greek pétasos, akin to petannýnai to spread out]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.