radical sign

noun

Definition of radical sign

: the sign √͞ or √ placed before an expression to denote that the square root is to be extracted or that the root marked by an index (as in ∛ or ∛ for the cube root) is to be extracted

First Known Use of radical sign

1668, in the meaning defined above

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The first known use of radical sign was in 1668

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Cite this Entry

“Radical sign.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radical%20sign. Accessed 10 Aug. 2020.

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