# 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
1550-60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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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 10, 2010
Historical Examples
• For if he were now solving decimals and square root he would be but a cog and not the great wheel itself.

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

Lewis Carroll
• The beet grown from this seed contained more sugar to the square inch—or was it to the square root?

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

Willis Eugene Tower
• Does a knowledge of botany necessarily involve a knowledge of square root and cube root?

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

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

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

Francis L. Lincoln
• He therefore thought that the perimeter or circumference of the circle itself would be the square root of exactly 10.

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 American Heritage® New Dictionary of Cultural Literacy, Third Edition
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### Difficulty index for square root

Few English speakers likely know this word

### Word Value for square

15
16
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