from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Mathematics The symbol −, as in 4 − 2 = 2, that is used to indicate subtraction or a negative quantity.
- noun Chemistry The same symbol, used to indicate levorotatory rotation of polarized light.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mathematics The symbol
−or -used to denote the operationof subtractionand to indicate that a number is negative.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a sign indicating the operation of subtraction
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