What is the meaning of radical?


  • Chemistry) two or more atoms bound together as a single unit and forming part of a molecule.
  • An atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule.
    • usage: "in the body free radicals are high-energy particles that ricochet wildly and damage cells"
  • A person who has radical ideas or opinions.
  • Mathematics) a quantity expressed as the root of another quantity. (
  • A character conveying the lexical meaning of a logogram.
  • Linguistics) the form of a word after all affixes are removed. (
    • usage: "thematic vowels are part of the stem"


  • Used of opinions and actions. ( far beyond the norm)
    • usage: "extremist political views"; "radical opinions on education"; "an ultra conservative"
  • Markedly new or introducing radical change.
    • usage: "a revolutionary discovery"; "radical political views"
  • Arising from or going to the root or source.
    • usage: "a radical flaw in the plan"
  • Of or relating to or constituting a linguistic root.
    • usage: "a radical verb form"
  • Especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem.
    • usage: "basal placentation"; "radical leaves"
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APAWordNet. (2010). radical. Retrieved April 26, 2018, from http://smartdefine.org/radical/definitions/1181850
ChicagoWordNet. 2010. "radical" http://smartdefine.org/radical/definitions/1181850 (accessed April 26, 2018).
HarvardWordNet 2010, radical, Smart Define, viewed 26 April, 2018, <http://smartdefine.org/radical/definitions/1181850>.
MLAWordNet. "radical" 23 October 2010. Web. 26 April 2018. <http://smartdefine.org/radical/definitions/1181850>
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