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gal·le·assalso gal·li·ass (găl′ē-ăs′, -əs)
A large, fast, heavily armed three-masted Mediterranean galley of the 1500s and 1600s.
[Old French galeasse, from Old Italian galeaza, augmentative of galea, galley, from Old Provençal or Catalan; see galley.]
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.
(Nautical Terms) nautical a three-masted lateen-rigged galley used as a warship in the Mediterranean from the 15th to the 18th centuries
[C16: from French galleasse, from Italian galeazza, from galea galley]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a fighting galley, lateen-rigged on three masts, used in the Mediterranean Sea from the 15th to the 18th centuries.
[1535–45; < Old French galleasse, galiace < Venetian galeaza]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.