Radical (from Latin: ', root) may refer to:

Politics and ideology

Politics

  • Classical radicalism, the ideology and movement started in late 18th century Britain and spread to continental Europe and Latin America in the 19th century
  • Radical politics, the political intent of fundamental societal change
  • Radical Party (disambiguation), several political parties
  • Radicals (UK), a British and Irish grouping in the early to mid-19th century
  • Radicalization
  • Politicians from the Radical Civic Union

Ideologies

  • Radical chic, a term coined by Tom Wolfe to describe the pretentious adoption of radical causes
  • Radical feminism, a perspective within feminism that focuses on patriarchy
  • Radical Islam, or Islamic extremism
  • Radical Christianity
  • Radical veganism, a radical interpretation of veganism, usually combined with anarchism
  • Radical Reformation, an Anabaptist movement concurrent with the Protestant Reformation

Science and mathematics

Science

  • Radical (chemistry), an atom, molecule, or ion with unpaired valence electron(s)
  • Radical surgery, where diseased tissue or lymph nodes are removed from a diseased organ

Mathematics

  • Radical expression involving roots, also known as an nth root
  • Solution in radicals
  • Radical symbol (√), used to indicate the square root and other roots
  • Radical of an algebraic group, a concept in algebraic group theory
  • Radical of an ideal, an important concept in abstract algebra
  • Radical of a ring, an ideal of "bad" elements of a ring
  • Jacobson radical, consisting of those elements in a ring R that annihilate all simple right R-modules
  • Nilradical of a ring, a nilpotent ideal which is as large as possible
  • Radical of a module, a component in the theory of structure and classification
  • Radical of an integer, in number theory, the product of the primes which divide an integer
  • Radical of a Lie algebra, a concept in Lie theory
  • Nilradical of a Lie algebra, a nilpotent ideal which is as large as possible
  • Left (or right) radical of a bilinear form, the subspace of all vectors left (or right) orthogonal to every vector

Linguistics

  • Root (linguistics), in morphology
  • Radical, a Semitic root consonant
  • Radical (Chinese characters), a glyph component
  • Radical consonant, in phonology

Arts and entertainment

Music

  • Radical (mixtape), by Odd Future, 2010
  • Radical (Every Time I Die album), 2021
  • Radical (Smack album), 1988
  • "Radicals" (song), a song by Tyler, The Creator from the 2011 album Goblin
  • "Radical", an instrumental by Dyro and Dannic, 2014

Architecture and design

  • Radical period (design), a period in late 1960s Italian design
  • Radical Baroque, an architectural style

Literature

  • Radical: Taking Back Your Faith from the American Dream, a 2010 book by Christian pastor David Platt
  • Radical: My Journey out of Islamist Extremism, a 2012 memoir by British activist Maajid Nawaz

Film

  • Radical (film), a 2023 Spanish language film

Other uses

  • Murphy Radical, a Canadian light aircraft design
  • Radical, Missouri, U.S., a ghost town
  • Radical Sportscars, a British sports car maker
  • Radical Entertainment, a Canadian video game developer
  • Radical.fm, a digital music streaming service
  • Radical Software, American art journal started in 1970

See also

  • The Radicalz, a World Wrestling Federation stable
  • Radical center (disambiguation)
  • Radical left (disambiguation)
  • Radical right (disambiguation)
  • Radikal (disambiguation)
  • Radicle, the first part of a seedling