radical

Definitions

1. 1adjective

   Of or pertaining to the root; proceeding directly from the root.

2. 2adjective

   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. 3adjective

   Belonging to, or proceeding from, the root of a plant; as, radical tubers or hairs.

4. 4adjective

   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. 5adjective

   Relating, or belonging, to the root, or ultimate source of derivation; as, a radical verbal form.

6. 6adjective

   Of or pertaining to a radix or root; as, a radical quantity; a radical sign. See below.

7. 7noun

   A primitive word; a radix, root, or simple, underived, uncompounded word; an etymon.

8. 8noun

   A primitive letter; a letter that belongs to the radix.

9. 9noun

   One who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; -- opposed to conservative.

10. 10noun

    A characteristic, essential, and fundamental constituent of any compound; hence, sometimes, an atom.

11. 11noun

    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. 12noun

    A radical quantity. See under Radical.

13. 13adjective

    A radical vessel. See under Radical.

14. 14noun

    (linguistics) the form of a word after all affixes are removed

    "thematic vowels are part of the stem"

    Synonyms

    baserootstemtheme
15. 15noun

    a character conveying the lexical meaning of a logogram

16. 16noun

    a person who has radical ideas or opinions

17. 17noun

    (mathematics) a quantity expressed as the root of another quantity

18. 18noun

    (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

    Synonyms

    group
19. 19noun

    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

    "in the body free radicals are high-energy particles that ricochet wildly and damage cells"

20. 20adjective

    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"

    Synonyms

    basal
21. 21adjective

    (used of opinions and actions) far beyond the norm

    "extremist political views"

    "radical opinions on education"

    Synonyms

    extremistultra
22. 22adjective

    markedly new or introducing radical change

    "a revolutionary discovery"

    "radical political views"

    Synonyms

    revolutionary
23. 23adjective

    arising from or going to the root or source

    "a radical flaw in the plan"

24. 24adjective

    of or relating to or constituting a linguistic root

    "a radical verb form"