square root

noun

: a factor of a number that when squared gives the number
the square root of 9 is ±3

Examples of square root in a Sentence

The square root of 9 is 3.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
High schoolers are mastering square roots, cell division, the Revolutionary War, and how to write the perfect essay. Melissa Willets, Parents, 6 June 2025 Williams saw that a simulation based on squishy pebbles would make the new algorithm’s space usage much smaller — roughly equal to the square root of the original algorithm’s time budget. Ben Brubaker, Quanta Magazine, 21 May 2025 This means they are made of both real numbers and the imaginary number i: the square root of negative 1. William Ross, The Conversation, 10 Mar. 2025 The new value was proportional to m times the square root of n. Steve Nadis, Quanta Magazine, 12 May 2025 See All Example Sentences for square root

Word History

First Known Use

1557, in the meaning defined above

Time Traveler
The first known use of square root was in 1557

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Cite this Entry

“Square root.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/square%20root. Accessed 18 Jun. 2025.

Kids Definition

square root

noun
: a number that when squared equals a specified number
+3 and -3 are both a square root of 9

More from Merriam-Webster on square root

Last Updated: - Updated example sentences
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