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We found 59 dictionaries with English definitions that include the word radical:
Click on the first link on a line below to go directly to a page where "radical" is defined.

General dictionaries General (33 matching dictionaries)
  1. radical: Merriam-Webster.com [home, info]
  2. radical: Oxford Learner's Dictionaries [home, info]
  3. radical: American Heritage Dictionary of the English Language [home, info]
  4. radical: Collins English Dictionary [home, info]
  5. radical: Vocabulary.com [home, info]
  6. radical, radical: Macmillan Dictionary [home, info]
  7. Radical, radical: Wordnik [home, info]
  8. radical: Cambridge Advanced Learner's Dictionary [home, info]
  9. radical: Wiktionary [home, info]
  10. radical: Webster's New World College Dictionary, 4th Ed. [home, info]
  11. radical: The Wordsmyth English Dictionary-Thesaurus [home, info]
  12. radical: Infoplease Dictionary [home, info]
  13. radical: Dictionary.com [home, info]
  14. radical: Online Etymology Dictionary [home, info]
  15. radical: UltraLingua English Dictionary [home, info]
  16. radical: Cambridge Dictionary of American English [home, info]
  17. Radical (Chinese), Radical (Chinese character), Radical (Chinese characters), Radical (Smack album), Radical (album), Radical (book), Radical (chemistry), Radical (mixtape), Radical: Wikipedia, the Free Encyclopedia [home, info]
  18. Radical: Online Plain Text English Dictionary [home, info]
  19. radical: Webster's Revised Unabridged, 1913 Edition [home, info]
  20. radical: Rhymezone [home, info]
  21. radical, radical, radical(e) (-aux): AllWords.com Multi-Lingual Dictionary [home, info]
  22. radical: Webster's 1828 Dictionary [home, info]
  23. radical: Hutchinson's Dictionary of Difficult Words [home, info]
  24. Radical: 1911 edition of the Encyclopedia Britannica [home, info]
  25. radical: Free Dictionary [home, info]
  26. radical: Hutchinson Dictionaries [home, info]
  27. radical: Mnemonic Dictionary [home, info]
  28. radical: WordNet 1.7 Vocabulary Helper [home, info]
  29. radical: LookWAYup Translating Dictionary/Thesaurus [home, info]
  30. radical: Dictionary/thesaurus [home, info]
  31. Radical: Dictionary of Phrase and Fable (1898) [home, info]

Art dictionaries Art (1 matching dictionary)
  1. radical: Literary Criticism [home, info]

Business dictionaries Business (1 matching dictionary)
  1. radical: Legal dictionary [home, info]

Computing dictionaries Computing (4 matching dictionaries)
  1. Radical: Cybernetics and Systems [home, info]
  2. Radical: The Difference [home, info]
  3. Radical: Unicode Glossary [home, info]
  4. Radical (chemistry), radical: Encyclopedia [home, info]

Medicine dictionaries Medicine (6 matching dictionaries)
  1. radical: Sound Alike Words [home, info]
  2. radical: online medical dictionary [home, info]
  3. radical: Prostate Cancer Interactive Glossary [home, info]
  4. Radical: Breast Cancer Glossary of Medical Terms [home, info]
  5. Radical: General Glossary [home, info]
  6. Radical (chemistry), radical: Medical dictionary [home, info]

Miscellaneous dictionaries Miscellaneous (2 matching dictionaries)
  1. radical: Sociology [home, info]
  2. radical: Political [home, info]

Science dictionaries Science (11 matching dictionaries)
  1. radical: Electrochemistry Dictionary [home, info]
  2. Radical: Chemistry Dictionary [home, info]
  3. Radical: Eric Weisstein's World of Chemistry [home, info]
  4. Radical: Eric Weisstein's World of Mathematics [home, info]
  5. radical: Botanical Terms [home, info]
  6. radical (or free radical): PHYSICAL ORGANIC CHEMISTRY [home, info]
  7. radical: MATH SPOKEN HERE! [home, info]
  8. radical (basal): Flora of New South Wales [home, info]
  9. Radical: The Orchid Lady's Illustrated Orchid Encyclopedia [home, info]
  10. radical, radical, radical, radical, radical, radical: PlanetMath Encyclopedia [home, info]
  11. Radical: Atmospheric Chemistry and Air Quality [home, info]

Sports dictionaries Sports (1 matching dictionary)
  1. Radical: Sports Definitions [home, info]

(Note: See radicals for more definitions.)

Quick definitions from Macmillan (
American English Definition British English Definition

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Quick definitions from WordNet (radical)

noun:  a sign placed in front of an expression to denote that a root is to be extracted
noun:  a character conveying the lexical meaning of a logogram
noun:  a person who has radical ideas or opinions
noun:  (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
noun:  an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule than 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")
noun:  (linguistics) the form of a word after all affixes are removed
adjective:  arising from or going to the root ("A radical flaw in the plan")
adjective:  of or relating to or constituting a linguistic root ("A radical verb form")
adjective:  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 ("Radical leaves")
adjective:  (used of opinions and actions) far beyond the norm ("Radical opinions on education")
adjective:  markedly new or introducing radical change ("Radical political views")

▸ Also see radicals
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Phrases that include radical:   radical mastectomy, radical sign, methyl radical, cacodyl radical, ethyl radical, more...

Words similar to radical:   basal, base, extremist, group, radicalness, revolutionary, root, stem, theme, ultra, basic, free radical, radical sign, root word, more...

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