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Meaning & Definition of Radical in English

English

Radical

/rædəkəl/

noun

1. (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

    synonym:
  • group
  • ,
  • radical
  • ,
  • chemical group

2. 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
  • "In the body free radicals are high-energy particles that ricochet wildly and damage cells"
    synonym:
  • free radical
  • ,
  • radical

3. A person who has radical ideas or opinions

    synonym:
  • radical

4. (mathematics) a quantity expressed as the root of another quantity

    synonym:
  • radical

5. A character conveying the lexical meaning of a logogram

    synonym:
  • radical

6. (linguistics) the form of a word after all affixes are removed

  • "Thematic vowels are part of the stem"
    synonym:
  • root
  • ,
  • root word
  • ,
  • base
  • ,
  • stem
  • ,
  • theme
  • ,
  • radical

adjective

1. (used of opinions and actions) far beyond the norm

  • "Extremist political views"
  • "Radical opinions on education"
  • "An ultra conservative"
    synonym:
  • extremist
  • ,
  • radical
  • ,
  • ultra

2. Markedly new or introducing radical change

  • "A revolutionary discovery"
  • "Radical political views"
    synonym:
  • revolutionary
  • ,
  • radical

3. Arising from or going to the root or source

  • "A radical flaw in the plan"
    synonym:
  • radical

4. Of or relating to or constituting a linguistic root

  • "A radical verb form"
    synonym:
  • radical

5. 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
  • "Basal placentation"
  • "Radical leaves"
    synonym:
  • radical
  • ,
  • basal

Examples of using

She has a very radical opinion about the problem.
Some Blacks seek more radical solutions.