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(Gambling, except Cards) chiefly Austral a gambling game in which two coins are tossed or spun. Bets are made on both coins landing with the same face uppermost
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
A formation with two elements disposed abreast; the remaining element(s) in rear.
Dictionary of Military and Associated Terms. US Department of Defense 2005.