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subtraction

[suh b-trak-shuh n] /səbˈtræk ʃən/
noun
1.
an act or instance of subtracting.
2.
Mathematics. the operation or process of finding the difference between two numbers or quantities, denoted by a minus sign (−).
Origin
1350-1400
1350-1400; Middle English < Late Latin subtractiōn- (stem of subtractiō) a withdrawing, equivalent to subtract(us) (see subtract) + -iōn- -ion
Related forms
nonsubtraction, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for sub traction

subtraction

/səbˈtrækʃən/
noun
1.
the act or process of subtracting
2.
a mathematical operation in which the difference between two numbers or quantities is calculated. Usually indicated by the symbol (–)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for sub traction

subtraction

n.

c.1400, "withdrawal, removal," from Late Latin subtractionem (nominative subtractio) "a drawing back, taking away," from past participle stem of Latin subtrahere "take away, draw off," from sub "from under" (see sub-) + trahere "to pull, draw" (see tract (n.1)). The mathematical sense is attested from early 15c.

Þou most know þat subtraccion is drawynge of one nowmber oute of anoþer nomber. ["The Crafte of Nombrynge," c.1425]

Online Etymology Dictionary, © 2010 Douglas Harper
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sub traction in Science
subtraction
  (səb-trāk'shən)   
The operation of finding the difference between two numbers or quantities.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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