square root


Definition of square root

: 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 That’s an appropriate label, because an imaginary number consists of the square root of a negative number, which by definition does not exist. John Horgan, Scientific American, "Is the Schrödinger Equation True?," 7 Jan. 2021 Ullisch’s solution is not something simple like the square root of 2. Quanta Magazine, "After Centuries, a Seemingly Simple Math Problem Gets an Exact Solution," 9 Dec. 2020 Taking the square root of −1 led to an entirely new system of arithmetic. Quanta Magazine, "Some Math Problems Seem Impossible. That Can Be a Good Thing.," 18 Nov. 2020 Mathematically, this is accomplished by taking the square root of each state contribution as a first step. Puja Ohlhaver, Wired, "How States Can Join Forces to Expand Covid Testing," 1 Sep. 2020 The 1996 algorithm required a number of computational steps that was roughly proportional to the square root of the number of nodes in the graph. Quanta Magazine, "A New Algorithm for Graph Crossings, Hiding in Plain Sight," 15 Sep. 2020 Even though the $16 contribution is four times the $4 contribution, its square root is only twice as much. Puja Ohlhaver, Wired, "How States Can Join Forces to Expand Covid Testing," 1 Sep. 2020 Calculate profit-margin and square root functions in addition to arithmetic basics, and view your results on an 8-digit display. Popular Science, "Reliable calculators for school, home, and work," 19 Mar. 2020 Fortune’s Anne Srader explores the possibilities–U, check mark, Nike swoosh, square root symbol, etc.–here. David Meyer, Fortune, "On racial equity, how can companies show they mean what they say?," 8 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'square root.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of square root

1557, in the meaning defined above

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Time Traveler for square root

Time Traveler

The first known use of square root was in 1557

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Statistics for square root

Last Updated

21 Jan 2021

Cite this Entry

“Square root.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/square%20root. Accessed 22 Jan. 2021.

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More Definitions for square root

square root


English Language Learners Definition of square root

mathematics : a number that produces a specified number when it is multiplied by itself

square root


Kids Definition of square root

: a number that when multiplied by itself equals a specified number The square root of 9 is 3.

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Comments on square root

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