Definitions of radical

  1. ( botany) 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"
  2. ( chemistry) two or more atoms bound together as a single unit and forming part of a molecule
  3. ( used of opinions and actions) far beyond the norm; " extremist political views"; " radical opinions on education"; " an ultra conservative"
  4. 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"
  5. ( linguistics) of or relating to or constituting a linguistic root; " a radical verb form"
  6. ( linguistics) the form of a word after all affixes are removed; " thematic vowels are part of the stem"
  7. a sign placed in front of an expression to denote that a root is to be extracted
  8. a character conveying the lexical meaning of a logogram
  9. a person who has radical ideas or opinions
  10. markedly new or introducing radical change; " a revolutionary discovery"; " radical political views"
  11. arising from or going to the root; " a radical flaw in the plan"
  12. 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"
  13. Of or pertaining to the root; proceeding directly from the root.
  14. Hence: Of or pertaining to the root or origin; reaching to the center, to the foundation, to the ultimate sources, to the principles, or the like; original; fundamental; thorough- going; unsparing; extreme; as, radical evils; radical reform; a radical party.
  15. Belonging to, or proceeding from, the root of a plant; as, radical tubers or hairs.
  16. Proceeding from a rootlike stem, or one which does not rise above the ground; as, the radical leaves of the dandelion and the sidesaddle flower.
  17. Relating, or belonging, to the root, or ultimate source of derivation; as, a radical verbal form.
  18. Of or pertaining to a radix or root; as, a radical quantity; a radical sign. See below.
  19. A primitive word; a radix, root, or simple, underived, uncompounded word; an etymon.
  20. A primitive letter; a letter that belongs to the radix.
  21. A characteristic, essential, and fundamental constituent of any compound; hence, sometimes, an atom.
  22. Specifically, a group of two or more atoms, not completely saturated, which are so linked that their union implies certain properties, and are conveniently regarded as playing the part of a single atom; a residue; -- called also a compound radical. Cf. Residue.
  23. A radical quantity. See under Radical, a.
  24. A radical vessel. See under Radical, a.
  25. One who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; - opposed to conservative.
  26. A simple word, or root, from which other words are formed; a person who holds extreme views and takes extreme measures.
  27. Pertaining to the root or origin; original; extreme; as, a radical difference of opinion; in mathematics, showing or containing the root of a number; pertaining to a political party of advanced views.
  28. Radically.
  29. Radicalness.
  30. 1. In chemistry, a group of atoms passing as such from one compound to another, acting thus like a single atom. 2. The haptophore group of an antibody. 3. Relating to the root or cause, thorough; as a radical operation, one which removes every trace of possibly diseased tissue, or makes recurrence impossible.
  31. A substance which admits combination with a simple body. Applied to active treatment for elimination of a diseased condition.
  32. Pertaining to the root, or origin: original: reaching to the principles: implanted by nature: not derived: serving to originate: ( bot.) proceeding immediately from the root: ( politics) ultra- liberal, democratic.
  33. A root: a primitive word or letter: one who advocates radical reform: ( chem.) the base of a compound.
  34. A root; primitive word; one who advocates a fundamental change in principles of government.
  35. Original; rooted; implanted by nature; reaching to the principles; pertaining to radicals.
  36. Proceeding from or pertaining to the root; essential; fundamental.
  37. Thoroughgoing; unsparing; extreme.
  38. An extremist.
  39. The primitive part of a word; a root; radicle.
  40. A quantity of which the root is required.
  41. A small root.
  42. Pertaining to the root or origin; original; fundamental; implanted by nature; primitive; underived; proceeding immediately from the root.
  43. A primitive word; a radix, root, or simple underived uncompounded word; a letter that belongs to the root; one who advocatea radical reform, or extreme changes of a democratic character in the state; the base of a compound. See Radix.
  44. Pert. to or arising from the root; fundamental; implanted by nature; constitutional; original; not derived or compounded; primitive; in bot., proceeding from a point close to the summit or crown of the root, applied to leaves close to the ground clustered at the base of a flower- stalk; complete; thorough.
  45. A root; in chem., the base or distinguishing part of a compound, whether itself a simple or compound; a primitive or uncompounded word or letter; a democrat or extreme politician.
  46. Arising from the root close to the ground, as basal leaves.

Antonyms for radical

fogy, old-line, traditionalistic, centrist, rightist, temperate, colonel blimp, liberal, prejudiced, traditional, archconservative, terrible, tentative, lousy, mossback, intolerant, trial, hard, stodgy, illiberal, old, execrable, inferior, incidental, wretched, traditionalist, progressive, brassbound, moderate, low-grade, stuffed shirt, awful, pathetic, second class, cauline, inadequate, bad, nonprogressive, incomplete, incident, central, standpat, poor, tory, old school, orthodox, middle-of-the-road, narrow, dodo, narrow-minded, Fud, doctrinal, mediocre, paleoconservative, bigoted, right-winger, conservative, superficial, palliative, strict, dogmatic, substandard, fossil, partial, button-down, die-hard, reactionary, middle of the roader, slight, small-minded, unsatisfactory, unreconstructed, conventional, hidebound, rigid, vile, stick-in-the-mud, rotten, atrocious, mossbacked, second-rate, ultraconservative, fuddy-duddy, unprogressive, middling, old fashioned.

Quotes of radical

  1. As you can imagine I'm disappointed as anything that I was not selected to be the presidential running mate. And I find it continually appalling that it would be a radical thing to have a woman on the ticket. – Kate Clinton
  2. The State of the Union may look rosy from the White House balcony or the suites of George Bush's wealthiest donors. But hardworking Americans will see through this president's efforts to wrap his radical agenda with a compassionate ribbon. – Howard Dean
  3. I never dared to be radical when young for fear it would make me conservative when old. – Robert Frost
  4. To the indefinite, uncertain mind of the American radical the most contradictory ideas and methods are possible. The result is a sad chaos in the radical movement, a sort of intellectual hash, which has neither taste nor character. – Emma Goldman
  5. Obedience is detachment from the self. This is the most radical detachment of all. But what is the self? The self is the principle of reason and responsibility in us. It is the root of freedom, it is what makes us men. – Bede Griffiths
  6. As the middle begins to feel safe enough to accept some of the so -called radical thinking, ideas move to the middle and a new edge is created. – Jasmine Guy
  7. I am a radical in thought( and principle) and a conservative in method( and conduct). – Rutherford B. Hayes
  8. Every genuine boy is a rebel and an anarch. If he were allowed to develop according to his own instincts, his own inclinations, society would undergo such a radical transformation as to make the adult revolutionary cower and cringe. – John Andrew Holmes
  9. To be radical an empiricism must neither admit into its constructions any element that is not directly experienced, nor exclude from them any element that is directly experienced. – William James
  10. When you are right you cannot be too radical when you are wrong, you cannot be too conservative. – Martin Luther King, Jr.
  11. In the little hall leading to it was a rack holding various Socialist or radical newspapers, tracts, and pamphlets in very small print and on very bad paper. The subjects treated were technical Marxist theories. – Agnes Smedley
  12. I'm as radical as libertarians come. – L. Neil Smith
  13. We have to fight radical Islam wherever it exists. It's in Afghanistan, it's in Saudi Arabia, throughout the Middle -East in big numbers and it's in the United States. – Tom Tancredo
  14. Radical Islamic fundamentalists harbor contempt for our democratic way of life and, given the opportunity, will stop at nothing to accomplish their goal of bringing our country to its knees. – Paul Weyrich
  15. I am a radical – Carter G. Woodson

Usage examples for radical

  1. Gainsborough is not a bit of a radical – A Red Wallflower by Susan Warner
  2. There are to follow certain radical changes in the realm of nature. – Quiet Talks about Jesus by S. D. Gordon
  3. The radical wing of the Democracy had now found its orator. – The United States Since The Civil War by Charles Ramsdell Lingley
  4. They are not so radical as those who go by the same name in Germany, France, and other European countries. – Norwegian Life by Ethlyn T. Clough
  5. I recollected then, when it was too late, that Dodds is an advanced Radical and absolutely hates the idea of imperialism. – Lalage's Lovers 1911 by George A. Birmingham
  6. They'll make a Radical of you among them, Lizzie. – The Eustace Diamonds by Anthony Trollope
  7. There were not loaves and fishes enough for the whole Radical party. – My First Years As A Frenchwoman, 1876-1879 by Mary King Waddington
  8. In '70 he offered his services to the Government of National Defence, and in '72 was elected to the National Assembly, where he signalised himself by his Radical opinions. – A Biographical Dictionary of Freethinkers of All Ages and Nations by Joseph Mazzini Wheeler
  9. Such radical lines of treatment should be discouraged. – Common Diseases of Farm Animals by R. A. Craig, D. V. M.
  10. 94. And, in a note upon this passage, he adds: This is to be understood of primitive or radical terms. – The Grammar of English Grammars by Goold Brown
  11. But the colonial secretary had obviously come to the opinion that it was necessary to make a radical change which would insure greater harmony between the executive and the popular bodies of the provinces. – Canada under British Rule 1760-1900 by John G. Bourinot
  12. But the honorable Senator thinks that I want to become a Radical – History of the Thirty-Ninth Congress of the United States by Wiliam H. Barnes
  13. Able men the Scotch, a little too radical in politics, and a little too liberal, as it is called, in a matter of much greater consequence; but a superior people, on the whole. – The Attache or, Sam Slick in England, Complete by Thomas Chandler Haliburton
  14. The agitation for the suffrage, it seemed to her, was the effective expression of all advanced, radical ideas for which she had always worked. – One Woman's Life by Robert Herrick
  15. And there are few signs of a radical change for the better. – England and Germany by Emile Joseph Dillon
  16. And it is possible that some radical alteration has taken place in Hugh Latimer's character, soul- whatever you choose to call that part of a man which controls his life- as a result of the operation. – Men, Women and Guns by H. C. (Herman Cyril) McNeile
  17. The radical negro newspapers published here urged negroes to leave the South and promised employment and protection. – Negro Migration during the War by Emmett J. Scott
  18. But the radical impulse soon spent itself. – John Marshall and the Constitution A Chronicle of the Supreme Court, Volume 16 In The Chronicles Of America Series by Edward S. Corwin
  19. One of these is more radical and aggressive, the other has more the air of fighting a slow retreat. – Pragmatism A New Name for Some Old Ways of Thinking by William James
  20. Of course this meant a change in the established order of things that was both serious and radical – The Facts of Reconstruction by John R. Lynch