radical sign

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noun Mathematics.

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

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Origin of radical sign

First recorded in 1660–70

Words nearby radical sign

radicalize, radical left, radically, radical mastectomy, radical right, radical sign, radicand, radicant, radicchio, radicel, radices

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use radical sign in a sentence

They are always suspended over a precipice, dangling by a slender thread that shows every sign of snapping.
How the PC Police Threaten Free Speech|Nick Gillespie|January 9, 2015|DAILY BEAST
It was hard not to take it as a sign, a personal comment on my own Jewish dating failings.
My Week on Jewish Tinder|Emily Shire|January 5, 2015|DAILY BEAST
But Brooke was out of step with the New Left and its notion of radical chic.
Ed Brooke: The Senate's Civil Rights Pioneer and Prophet of a Post-Racial America|John Avlon|January 4, 2015|DAILY BEAST
If he did, it could be a sign that our politicians are ready to resume genuine policy-making across party lines.
Christie Blames Parents for Bad Economy|Monica Potts|January 3, 2015|DAILY BEAST

President Harry Truman kept a sign on his desk that read: “The Buck Stops Here.”
The ‘No Child’ Rewrite Threatens Your Kids’ Future|Jonah Edelman|January 3, 2015|DAILY BEAST
Its continued presence in pulmonary tuberculosis is, however, a grave prognostic sign, even when the physical signs are slight.
A Manual of Clinical Diagnosis|James Campbell Todd
Idly his pen traced upon the paper in front of him a large X, the sign of the unknown quantity.
Uncanny Tales|Various
Here they are seldom abundant, but their constant presence is the most reliable urinary sign of the disease.
A Manual of Clinical Diagnosis|James Campbell Todd
Waxy casts are found in most advanced cases of nephritis, where they are an unfavorable sign.
A Manual of Clinical Diagnosis|James Campbell Todd
Scouts reported that Porter still occupied his camp, and showed no sign of moving.
The Courier of the Ozarks|Byron A. Dunn

British Dictionary definitions for radical sign

radical sign

noun

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√

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012