# square root

noun
1. 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.

## Origin of square root

1
First recorded in 1550–60

## Words Nearby square root

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

## How to use square root in a sentence

• In previous tournaments, no one had been able to complete all 10 square root problems within the time limit.

The Other World Cup | Alex Bellos | June 11, 2010 | THE DAILY BEAST
• Does a knowledge of botany necessarily involve a knowledge of square root and cube root?

• I wanted to go through square root, but he said he didn't know anything about square root, and it wasn't any use, anyway.

Blue Goose | Frank Lewis Nason
• You refused my help in square root, and are taking lessons in painting from Miss Hartwell.

Blue Goose | Frank Lewis Nason
• Or, once more, the speed of each planet in its orbit is as the inverse square-root of its distance from the sun.

Pioneers of Science | Oliver Lodge
• A common rule is that the rate rises as the square root of the distance, rather than in proportion to it.

## British Dictionary definitions for square root

square root

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

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

## Scientific definitions for square root

square root

1. 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.