radical sign Hear it!

radical sign definition

radical sign

the sign (√ or ) used before a quantity to indicate that the square root (or a specified root indicated by an imposed index number) is to be extracted: derived from the r in Latin radix, root

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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