from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A divisor of a quantity that when squared gives the quantity. For example, the square roots of 25 are 5 and −5 because 5 × 5 = 25 and (−5) × (−5) = 25.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun mathematics Of a number, another number which, when squared, yields the original number; sometimes constrained to be the positive number when two solutions exist.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a number that when multiplied by itself equals a given number


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  • Can anyone tell me please how to put a square root sign in a word?

    November 7, 2008

  • Copy and paste this: √

    To get a menu of special characters on a Mac, put the cursor where you want the character to appear, then select 'Edit -> Special Characters...' in the Finder. A window will pop up, in which you can select the character you want and click 'insert', and it'll appear.

    November 8, 2008

  • Ta muchly, John.

    November 8, 2008