radical

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radical

 [rad´ĭ-kal]
1. thorough or sweeping; directed to the cause or root of a morbid process.
2. a group of atoms that enters into and goes out of chemical combination without change and that forms one of the fundamental constituents of a molecule.
color radical chromophore.
free radical a radical that carries an unpaired electron; such radicals are extremely reactive, with a very short half-life.
oxygen radical a toxic metabolite of oxygen, such as superoxide or singlet oxygen, capable of damaging microorganisms and normal tissues.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

rad·i·cal

(rad'i-kăl), Do not confuse this word with radicle.
1. In chemistry, a group of elements or atoms usually passing intact from one compound to another, but usually incapable of prolonged existence in a free state (for example, methyl, CH3); in chemical formulas, a radical is often distinguished by being enclosed in parentheses or brackets.
2. Thorough or extensive; relating or directed to the extirpation of the root or cause of a morbid process; for example, a radical operation.
3. Denoting treatment by extreme, drastic, or innovative, as opposed to conservative, measures.
4. Synonym(s): free radical
5. A functional group in a molecule or molecular entity.
[L. radix (radic-), root]
Farlex Partner Medical Dictionary © Farlex 2012

radical

(răd′ĭ-kəl)
adj.
1. Departing markedly from the usual or customary; extreme or drastic: a radical change in diet.
2. Medicine Relating to or being surgery that is extreme or drastic in an effort to eradicate all existing or potential disease: radical hysterectomy.
3. Botany
a. Of, relating to, or arising from a root: radical hairs.
b. Arising from the base of a stem or from a below-ground stem or rhizome: radical leaves.

rad′i·cal·ly adv.
rad′i·cal·ness n.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

rad·i·cal

(rad'i-kăl)
1. chemistry A group of elements or atoms usually passing intact from one compound to another, but usually incapable of prolonged existence in a free state (e.g., methyl, CH3); in chemical formulas, a radical is often distinguished by being enclosed in parentheses or brackets.
2. Directed to the extirpation of the root or cause of a morbid process, e.g., a radical operation.
3. Denoting treatment by extreme, drastic, or innovative, as opposed to conservative, measures.
4. Synonym(s): free radical.
[L. radix (radic-), root]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

radical

(of plants) arising from the root or crown.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

rad·i·cal

(rad'i-kăl)
1. In chemistry, a group of elements or atoms usually passing intact from one compound to another, but usually incapable of prolonged existence in a free state (e.g., methyl, CH3).
2. Thorough or extensive; relating or directed to the extirpation of the root or cause of a morbid process.
3. Denoting treatment by extreme, drastic, or innovative, as opposed to conservative, measures.
[L. radix (radic-), root]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
So, on any given policy prescription it is more likely, although not guaranteed, that complementarian and instrumentalist reformists will be able to find agreement, as opposed to complementarians agreeing with either of the radicalist positions.
Principles Constituting the Programme of the Cyprus National Radicalist Union
Baxter summarizes the Catholic Worker Movement, begun by Day and Peter Maurin in 1933, as a "non-state-centered, theologically-informed, radicalist perspective." (78) His approach has been influenced by a Worker radicalism in the sense of grounding the roots of social construction in the work of Christ, and in refusing to conform to the (dis)order imposed by the modern nation-state.
The five "radicalists" contributing to the first issue come from a variety of backgrounds, interests and methodologies.
It might also be used by "fundamentalists and radicalists in other countries as a playground for future destabilisation".
Guy very usefully draws together the complex threads of debates between Individualists, New Radicalists, and Fabian Socialists, and examines Wilde's argument in some detail.
At most, radicalists who advocate a way of life in tune with the truth (whatever that truth is supposed to be) lead to a disruption of the real basis of our communal practices, without being able thoroughly to eliminate that basis.
15), accommodates a variety of ideological positions and leads to the remark that the "radicalists seem[ed] to have no common view on luxury and waste" (p.
Radicalists, by contrast, place a much higher priority on deregulating prices relative to wages.
The radicalists are exclusively a modem phenomenon, whose emergence is a direct response to the particular problems of the 20th century.(53) Their major spokesman was Sayid Qutb.
Since the arrival of the first batch of these teachers, a whole generation of radicalists have thrived in Algeria.
The Pakistanis as a nation are sick of being apologists for its radicalists, its madrassahs, for losing precious lives in terror attacks, C for being blamed for everything under the sun.