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Definition of Radical

Radical

  1. Of or pertaining to the root; proceeding directly from the root.
  2. 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.
  3. Belonging to, or proceeding from, the root of a plant; as, radical tubers or hairs.
  4. 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.
  5. Relating, or belonging, to the root, or ultimate source of derivation; as, a radical verbal form.
  6. Of or pertaining to a radix or root; as, a radical quantity; a radical sign. See below.
  7. A primitive word; a radix, root, or simple, underived, uncompounded word; an etymon.
  8. A primitive letter; a letter that belongs to the radix.
  9. One who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; -- opposed to conservative.
  10. A characteristic, essential, and fundamental constituent of any compound; hence, sometimes, an atom.
  11. 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.
  12. A radical quantity. See under Radical, a.
  13. A radical vessel. See under Radical, a.

Radical Quotations

With the development of industrial capitalism, a new and unanticipated system of injustice, it is libertarian socialism that has preserved and extended the radical humanist message of the Enlightenment and the classical liberal ideals that were perverted into an ideology to sustain the emerging social order.
Noam Chomsky

The major advances in speed of communication and ability to interact took place more than a century ago. The shift from sailing ships to telegraph was far more radical than that from telephone to email!
Noam Chomsky

If you have always believed that everyone should play by the same rules and be judged by the same standards, that would have gotten you labeled a radical 60 years ago, a liberal 30 years ago and a racist today.
Thomas Sowell

Universal suffrage is sound in principle. The radical element is right.
Rutherford B. Hayes

Male and female represent the two sides of the great radical dualism. But in fact they are perpetually passing into one another. Fluid hardens to solid, solid rushes to fluid. There is no wholly masculine man, no purely feminine woman.
Margaret Fuller
More "Radical" Quotations

Radical Translations

radical in Dutch is ingrijpend, grondig, radicaal
radical in Swedish is radikal, radikal, grundlig
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