plussage

plussage

(ˈplʌsɪdʒ)
n
an amount over and above another amount
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

plus•sage

(ˈplʌs ɪdʒ)

n.
a surplus amount.
[1920–25]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.