radical sign

American  

noun

Mathematics.

1. the symbol √ or indicating extraction of a root of the quantity that follows it, as √25=5 or .

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radical sign British  

noun

1. the symbol √ placed before a number or quantity to indicate the extraction of a root, esp a square root. The value of a higher root is indicated by a raised digit in front of the symbol, as in ³√

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Etymology

Origin of radical sign

First recorded in 1660–70

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Example Sentences

See Examples For:

radical sign

When we use a radical sign, it indicates the principal or positive root.

From Textbooks ● May 6, 2020

Be careful that it is clear that i is not under the radical sign.

From Textbooks ● May 6, 2020

Put parentheses only around the 5z since 3 is not under the radical sign.

From Textbooks ● May 6, 2020

Since squaring a quantity and taking a square root are ‘opposite’ operations, we will square both sides in order to remove the radical sign and solve for the variable inside.

From Textbooks ● Apr. 22, 2020

In the quadratic formula, what is the name of the expression under the radical sign and how does it determine the number of and nature of our solutions?

From Textbooks ● Feb. 13, 2015

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