- a quantity expressed as a root of another quantity.
- the set of elements of a ring, some power of which is contained in a given ideal.
- radical sign.
Origin of radical
Synonyms for radical
Antonyms for radical
Related Words for radicalprofound, revolutionary, militant, fanatical, progressive, uncompromising, far-out, extremist, violent, sweeping, leftist, renegade, fanatic, firebrand, insurgent, agitator, rebel, subversive, anarchist, reformer
Examples from the Web for radical
Contemporary Examples of radical
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
January 4, 2015
He has become the most radical pope in modern memory for his economic populism.How Pope Francis Became the World’s BFF
December 21, 2014
Two hostages are dead and 15 others free after an Islamic radical took them hostage before police killed him.Jihadi Siege in Sydney Ends in Gunfight
Courtney Subramanian, Lennox Samuels, Chris Allbritton
December 15, 2014
The event grew out of an anti-consumerist action by the Danish radical theater collective Solvognen.Before the Bros, SantaCon Was as an Anti-Corporate Protest
December 12, 2014
Just last year, over 200 Nigerian girls were kidnapped from their school by the radical Islamist group Boko Haram.Promoting Girls’ Education Isn’t Enough: Malala Can Do More
December 9, 2014
Historical Examples of radical
The difference too is radical; it goes to the heart of the mystery.'Tis Sixty Years Since
Charles Francis Adams
The influence of Westhampton is Radical, and fills the Council with a lot of outsiders.Viviette
William J. Locke
"Yes, by that Radical miller who lives at Martover," said Marion.The Coryston Family
Mrs. Humphry Ward
For under all her radical talk Sue had the kindest heart in the world.
Into my reverie that night Sue burst with a dozen radical friends.
Word Origin for radical
late 14c., in a medieval philosophical sense, from Late Latin radicalis "of or having roots," from Latin radix (genitive radicis) "root" (see radish). Meaning "going to the origin, essential" is from 1650s. Radical sign in mathematics is from 1680s.
Political sense of "reformist" (via notion of "change from the roots") is first recorded 1802 (n.), 1817 (adj.), of the extreme section of the British Liberal party (radical reform had been a current phrase since 1786); meaning "unconventional" is from 1921. U.S. youth slang use is from 1983, from 1970s surfer slang meaning "at the limits of control." Radical chic is attested from 1970; popularized, if not coined, by Tom Wolfe. Radical empiricism coined 1897 by William James (see empiricism).
1630s, "root part of a word, from radical (adj.) Political sense from 1802; chemical sense from 1816.
In politics, someone who demands substantial or extreme changes in the existing system.