# square root

- a quantity of which a given quantity is the square: The quantities +6 and −6 are square roots of 36 since (+6)×(+6)=36 and (−6)×(−6)=36.

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## Origin of square root

First recorded in 1550–60

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for square root

### Historical Examples of square root

On a similar plan a tapering wedge acts as a square-root extractor, displacing water as the square of its depth of immersion.

Inventors at WorkGeorge Iles

## square root

- a number or quantity that when multiplied by itself gives a given number or quantity2 is a square root of 4, usually written √4 or 4 1/2

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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

## square root

- A number that, when squared, yields a given number. For example, since 5 X 5 = 25, the square root of 25 (written √25) is 5.

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The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

## square root

A number that, when multiplied by itself, will result in a given number. The square root of four is two; the square root of one hundred is ten.

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## Note

The square roots of many numbers, such as three, are irrational numbers.

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.