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1. Dictionary

   radical

   /ˈradɪkl/

   adjective

   • 1. (especially of change or action) relating to or affecting the fundamental nature of something; far-reaching or thorough: "a radical overhaul of the existing regulatory framework" Similar thoroughgoingthoroughcompletetotalentireabsoluteuttercomprehensiveexhaustiveroot-and-branchsweepingfar-reachingwide-rangingextensiveprofounddrasticsevereseriousmajordesperatestringentviolentforcefulrigorousdraconianOpposite superficial
   • ▪ forming an inherent or fundamental part of the nature of someone or something: "the assumption of radical differences between the mental attributes of literate and non-literate peoples" Similar fundamentalbasicessentialquintessentialinherentinnatestructuraldeep-seatedintrinsicorganicconstitutiverootOpposite minor
   • ▪ (of surgery or medical treatment) thorough and intended to be completely curative.
   • 2. advocating or based on thorough or complete political or social change; representing or supporting an extreme or progressive section of a political party: "a radical activist" Similar revolutionaryprogressivereformingreformistprogressivistrevisionistleftistleft-wingsocialistanti-capitalistextremistfanaticalmilitantdiehardinformal:wokeright-oninformal, derogatory:commieBolshevikleftyredpinkbolshieOpposite conservativereactionarymoderate
   • ▪ belonging to an extreme section of the Liberal party during the 19th century. historical British
   • ▪ characterized by independence of or departure from tradition; innovative or unorthodox: "the daring, avant-garde spirit of the music was too radical for the conservative audience"
   • 3. denoting or relating to the roots of a word.
   • ▪ belonging to the root of a chord.
   • 4. relating to or forming the root of a number or quantity.
   • 5. of, or springing direct from, the root or stem base of a plant.
   • 6. very good; excellent: informal North American "Okay, then. Seven o'clock. Radical!"

   noun

   • 1. a person who advocates thorough or complete political or social change, or a member of a political party or section of a party pursuing such aims.
   • 2. a group of atoms behaving as a unit in a number of compounds.
   • 3. the root or base form of a word.
   • ▪ any of the basic set of approximately 214 Chinese characters constituting semantically or functionally significant elements in the composition of other characters and used as a means of classifying characters in dictionaries.
   • 4. a quantity forming or expressed as the root of another.
   • ▪ a radical sign.

   Word Origin late Middle English (in the senses ‘forming the root’ and ‘inherent’): from late Latin radicalis, from Latin radix, radic- ‘root’.

   Derivatives

   • 1. radicalness noun

   Scrabble Points: 10

   • R

     1

   • A

     1

   • D

     2

   • I

     1

   • C

     3

   • A

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   • L

     1

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   More definitions, origin and scrabble points

2. dictionary.cambridge.org › dictionary › englishRADICAL | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

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   Learn the meaning of radical as an adjective, noun, and medical term. Find out how to use radical in sentences and phrases related to social, political, or economic change, or surgery.

   • English (US)

     RADICAL meaning: 1. believing or expressing the belief that...

   • Radical: French Translation

     RADICAL translate: radical/-ale, radical/-ale, fondamental,...

   • Free Radical

     FREE RADICAL definition: 1. a molecule that has an extra...

   • Radical: German Translation

     radical translate: fundamental, drastisch, radikal, der/die...

   • Traditional

     RADICAL translate: 支援變革的, 激進的;過激的;極端的, 極其重要的, 根本的；徹底的，完全的,...

   • Simplified

     RADICAL translate: 支持变革的, 激进的;过激的;极端的, 极其重要的, 根本的；彻底的，完全的,...

   • Znaczenie Radical, Definicja W Cambridge English Dictionary

     radical definicja: 1. believing or expressing the belief...

   • Radical in Spanish

     RADICAL translate: radical, radical, radical, radical...

3. www.merriam-webster.com › dictionary › radicalRadical Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › radical

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   Learn the origin, synonyms, examples, and usage of the word radical as an adjective and a noun. Find out how radical can mean a root, a principle, an extreme, a political activist, or a mathematical expression.

4. Videos

   • 

     7:57

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     Adding and simplifying radicals | Pre-Algebra | Khan Academy

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     Solving Radical Equations

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5. www.dictionary.com › browse › radicalRADICAL Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › radical

   • Cached

   Radical definition: of or going to the root or origin; fundamental. See examples of RADICAL used in a sentence.

6. www.vocabulary.com › dictionary › radicalRadical - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › radical

   noun. 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. synonyms: free radical. see more.

7. www.collinsdictionary.com › dictionary › englishRADICAL definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › dictionary › english

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   radical, extreme, fanatical denote that which goes beyond moderation or even to excess in opinion, belief, action, etc. radical emphasizes the idea of going to the root of a matter, and this often seems immoderate in its thoroughness or completeness: radical ideas; radical changes or reforms. extreme applies to excessively biased ideas ...

8. dictionary.cambridge.org › dictionary › learner-englishRADICAL | meaning - Cambridge Learner's Dictionary

   dictionary.cambridge.org › dictionary › learner-english

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   Learn the meaning of radical as an adjective and a noun, and how to use it in different contexts. Find out the synonyms, antonyms, and translations of radical in other languages.

9. www.thefreedictionary.com › radicalRadical - definition of radical by The Free Dictionary

   www.thefreedictionary.com › radical

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   Radical can mean a root, a group of atoms, a slang term, or a political activist. Learn the different meanings and usage of radical in various contexts with examples and synonyms.