Look up radical in
Wiktionary, the free dictionary.

Radical (from Latin radicis, genitive of radix "root") can refer to many different things and concepts.

American Culture

• Radical may be used as a spoken expression of appreciation of a difficult or dangerous activity, event, or stunt. (See also Tubular and Awesome.)

Chemistry

• In chemistry, a radical is an atom, molecule, or ion which is likely to take part in chemical reactions.

Mathematics

• The symbol √ used to indicate the square root or nth root
• Radical of an algebraic group, a concept in algebraic group theory
• Radical of an ideal, an important concept in abstract algebra
• Radical of an integer, a concept in number theory
• Symmetric bilinear form, a concept in linear algebra
• Radical of a Lie algebra, a concept in Lie theory

Linguistics

• Radical consonant, which involves the root of the tongue
• Radical (Chinese character), part of a Chinese character under which it is indexed in a dictionary (also called bùshǒu 部首)
• One of the three consonants in a Semitic trilateral or quadrilateral root

Society

• Political radicalism
  • Radicalism (historical), the Radical Movement which began in late 18th century Britain and spread to continental Europe and Latin America in the 19th century
  • Radical left, another term for the far left
  • Radical right, another term for the far right
  • Extremism, political standpoints that are perceived as revolutionary or extreme

• Radical Whigs, influential early writers on Radicalism
• Radical Republican (USA), a member of an influential group of American politicians during the Civil War reconstruction
• Radical Party, one of a number of political parties around the world
• Radicals (UK), parliamentary progressives who were part of the nineteenth-century Liberal coalition
• Industrial Radicals, members of the fictional Industrial Radical Party

Businesses and organizations

• Radical Sportscars, an English sports car maker
• Radical Entertainment, a video game developer based in Vancouver, Canada
• Free Radical Design, a video game developer based in Nottingham, England
• Free Radicals (band), a jazz-funk musical group from Houston, TX
• Radical Matters, a record label
• Free Radical Centre

Music albums

• Radical (Smack album), Smack's fourth studio album, released in 1988

Other

• In cabinet making, another way of saying external plinth^{citation needed}
• Radical Baroque, in architecture

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.