1. A variation of backgammon.
2. A card game in which two cards are dealt face up and a player bets whether the rank of the next card will be between the ranks of the two cards.
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.
(Games, other than specified) a form of backgammon
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ace•y-deuc•y(ˈeɪ siˈdu si, -ˈdyu-)
a form of backgammon.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.