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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" Scrapingweb Dictionary DB
  2. (chemistry) two or more atoms bound together as a single unit and forming part of a molecule Scrapingweb Dictionary DB
  3. (used of opinions and actions) far beyond the norm; "extremist political views"; "radical opinions on education"; "an ultra conservative" Scrapingweb Dictionary DB
  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" Wordnet Dictionary DB
  5. (linguistics) of or relating to or constituting a linguistic root; "a radical verb form" Scrapingweb Dictionary DB
  6. (linguistics) the form of a word after all affixes are removed; "thematic vowels are part of the stem" Scrapingweb Dictionary DB
  7. a sign placed in front of an expression to denote that a root is to be extracted Scrapingweb Dictionary DB
  8. a character conveying the lexical meaning of a logogram Scrapingweb Dictionary DB
  9. a person who has radical ideas or opinions Scrapingweb Dictionary DB
  10. markedly new or introducing radical change; "a revolutionary discovery"; "radical political views" Scrapingweb Dictionary DB
  11. arising from or going to the root; "a radical flaw in the plan" Scrapingweb Dictionary DB
  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" Wordnet Dictionary DB
  13. Of or pertaining to the root; proceeding directly from the root. Webster Dictionary DB
  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. Webster Dictionary DB
  15. Belonging to, or proceeding from, the root of a plant; as, radical tubers or hairs. Webster Dictionary DB
  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. Webster Dictionary DB
  17. Relating, or belonging, to the root, or ultimate source of derivation; as, a radical verbal form. Webster Dictionary DB
  18. Of or pertaining to a radix or root; as, a radical quantity; a radical sign. See below. Webster Dictionary DB
  19. A primitive word; a radix, root, or simple, underived, uncompounded word; an etymon. Webster Dictionary DB
  20. A primitive letter; a letter that belongs to the radix. Webster Dictionary DB
  21. A characteristic, essential, and fundamental constituent of any compound; hence, sometimes, an atom. Webster Dictionary DB
  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. Webster Dictionary DB
  23. A radical quantity. See under Radical, a. Webster Dictionary DB
  24. A radical vessel. See under Radical, a. Webster Dictionary DB
  25. One who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; - opposed to conservative. Webster Dictionary DB
  26. A simple word, or root, from which other words are formed; a person who holds extreme views and takes extreme measures. The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919.
  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. The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919.
  28. Radically. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  29. Radicalness. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  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. A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
  31. A substance which admits combination with a simple body. Applied to active treatment for elimination of a diseased condition. Warner's pocket medical dictionary of today. By William R. Warner. Published 1898.
  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. The american dictionary of the english language. By Daniel Lyons. Published 1899.
  33. A root: a primitive word or letter: one who advocates radical reform: (chem.) the base of a compound. The american dictionary of the english language. By Daniel Lyons. Published 1899.
  34. A root; primitive word; one who advocates a fundamental change in principles of government. The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894.
  35. Original; rooted; implanted by nature; reaching to the principles; pertaining to radicals. The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894.
  36. Proceeding from or pertaining to the root; essential; fundamental. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  37. Thoroughgoing; unsparing; extreme. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  38. An extremist. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  39. The primitive part of a word; a root; radicle. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  40. A quantity of which the root is required. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  41. A small root. A dictionary of scientific terms. By Henderson, I. F.; Henderson, W. D. Published 1920.
  42. Pertaining to the root or origin; original; fundamental; implanted by nature; primitive; underived; proceeding immediately from the root. Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914.
  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. Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914.
  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. Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
  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. Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
  46. Arising from the root close to the ground, as basal leaves. A dictionary of scientific terms. By Henderson, I. F.; Henderson, W. D. Published 1920.
  47. [Latin] Arising from the root close to the ground, as basal leaves (bot.). na
  48. One who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; -- opposed to conservative. mso.anu.edu.au
  49. One who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; opposed to conservative. dictgcide_fs
  50. 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. dictgcide_fs
  51. rad'i-kal, adj. pertaining to the root or origin: original: fundamental: intrinsic: primitive: implanted by nature: not derived: serving to originate: (bot.) proceeding immediately from the root: (politics) ultra-liberal, democratic.--n. a root: a primitive word or letter: one who advocates radical reform, an uncompromising democratic politician: (chem.) the base of a compound.--v.t. RAD'ICALISE, to make radical.--v.i. to become radical, adopt radical political principles.--n. RAD'ICALISM, the principles or spirit of a radical or democrat.--adv. RAD'ICALLY.--n. RAD'ICALNESS. [Radix.] gutenberg.org/ebooks/37683
  52. Is one in which the disease is destroyed, as it were, from the root. It is used in opposition to palliative cure. Medical Lexicon. A Dictionary of Medical Science
  53. Of the root (s); naturally inherent, essential, fundamental, (r. humour, heat, &c., in medieval philos. & still joc., moisture, heat, &c., essential to life; a r. error; the r. rottenness of human nature); forming the basis, primary, (the r. idea or principles of a system); affecting the foundation, going to the root, root-&-branch, (r. change, cure, reform), (of politicians) desiring such reforms, belonging to extreme section of Liberal party, (of measures &c.) advanced by or according to principles of r. politicians, whence radicalism (2) n., radicalize (3) v.t. & i., radicalization n.; (Math.) of the root of a number or quantity (r. sign, &c., indicating that square, cube, fourth, &c. root of number following is to be extracted; (Philol.) of the roots of words (r. word, not analysable into root& other known element); (Mus.) belonging to the root of a chord; (Bot.) of, springing direct from, the root or the main stem close to it; hence radically adv. (N.): (Philol.) root; fundamental principle; (Math.) quantity forming or expressed as root of another, also the r. sign; (Chem.) element or atom, or group of these, forming base of compound& remaining unaltered during compound\'s ordinary chemical changes; (Pol.; also colloq. rad) person holding r. views or belonging to r. party. [late Latin] Concise Oxford Dictionary
  54. Atom or group of atoms which may be combined with other atoms or groups. American pocket medical dictionary.
  55. Directed to the cause; going to the root or source of a morbid process. American pocket medical dictionary.
  56. Pertaining to a root. Appleton's medical dictionary.
  57. Springing from the root or from a rootlike portion of the stem. Appleton's medical dictionary.
  58. Concerned with the root, origin, or essence; reaching to the root, thorough; curative as opposed to palliative. Appleton's medical dictionary.
  59. Of an operation, one which removes thoroughly every trace of diseased tissue or the whole of an organ or organs. [Lat.] Appleton's medical dictionary.
  60. [L.] (Chem.) A salt R. is a simple body which with hydrogen forms an acid, or with metals a salt. A compound R. is a compound which takes the place of a metal in chemical combinations; these are met with chiefly in organic chemistry. Glossary of terms and phrases - Percy
  61. n. A primitive word ; a root or simple, underived, uncompounded word : - a letter that belongs to the root ;-au extreme liberal in politics ; a member of a political party which advocated radical or thorough reform in the constitution and administrative government of the country;-in chemistry, the original element or principle in a compound substance ; that which constitutes the distinguishing principle of an acid or base by its union with an acidifying or basifying element or ingredient. Cabinet Dictionary

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