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# 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
1550-1560
First recorded in 1550-60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for square root
Contemporary Examples
• In previous tournaments, no one had been able to complete all 10 square root problems within the time limit.

June 11, 2010
Historical Examples
• The discharge is proportional to the square root of the pressure.

• He says that the square root of 3,630, multiplied by 2, equals the length plus the breadth.

Lewis Carroll
• Here's the square root sign, I remember Carter telling me that.

C.C. Beck
• And one cried, "Can you show me how to extract this square root?"

Charles Kingsley
• The period is directly proportional to the square root of the length.

Willis Eugene Tower
• Like the world of imaginary numbers, the square root of minus one.

Samuel R. Delany
• If this is equal to the remainder, we have found the square root.

• So they tried him with square root, in which he turned out to be equally dumb.

• The square root of the number is about the twist for roving.

Francis L. Lincoln
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 41/2
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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square root in Science
 square root   A number that, when squared, yields a given number. For example, since 5 × 5 = 25, the square root of 25 (written √25) is 5.
The American Heritage® Science Dictionary
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square root in Culture

### square root definition

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.

Note: The square roots of many numbers, such as three, are irrational numbers.
The New Dictionary of Cultural Literacy, Third Edition