radical
I. adjective Etymology: Middle English, from Late Latin radicalis, from Latin radic-, radix root — more at root Date: 14th century 1. of, relating to, or proceeding from a root: as a. (1) of or growing from the root of a plant <
radical tubers
>
(2) growing from the base of a stem, from a rootlike stem, or from a stem that does not rise above the ground <
radical leaves
>
b. of, relating to, or constituting a linguistic root c. of or relating to a mathematical root d. designed to remove the root of a disease or all diseased and potentially diseased tissue <
radical surgery
>
<
radical mastectomy
>
2. of or relating to the origin ; fundamental 3. a. marked by a considerable departure from the usual or traditional ; extreme b. tending or disposed to make extreme changes in existing views, habits, conditions, or institutions c. of, relating to, or constituting a political group associated with views, practices, and policies of extreme change d. advocating extreme measures to retain or restore a political state of affairs <
the radical right
>
4. slang excellent, coolradicalness noun II. noun Date: 1641 1. a. a root part b. a basic principle ; foundation 2. a. root 6 b. a sound or letter belonging to a radical 3. one who is radical 4. free radical; also a group of atoms bonded together that is considered an entity in various kinds of reactions or as a subunit of a larger molecule 5. a. a mathematical expression indicating a root by means of a radical sign b. radical sign

New Collegiate Dictionary. 2001.

Synonyms:

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  • radical — radical, ale, aux [ radikal, o ] adj. et n. • fin XVe; bas lat. radicalis, de radix « racine » I ♦ Adj. 1 ♦ Qui tient à l essence, au principe (d une chose, d un être). ⇒ foncier, fondamental; absolu. « L instinct le plus radical dans l homme, le …   Encyclopédie Universelle

  • Radical — Rad i*cal (r[a^]d [i^]*kal), a. [F., fr. L. radicalis having roots, fr. radix, icis, a root. See {Radix}.] 1. Of or pertaining to the root; proceeding directly from the root. [1913 Webster] 2. Hence: Of or pertaining to the root or origin;… …   The Collaborative International Dictionary of English

  • Radical — (from Latin radicis , genitive of radix root ) can refer to many different things and concepts.Mathematics*The symbol √ used to indicate the square root or nth root *Radical of an algebraic group, a concept in algebraic group theory *Radical of… …   Wikipedia

  • radical — radical, ale (ra di kal, ka l ) adj. 1°   Terme de botanique. Qui appartient à la racine, qui part de la racine. Pédoncules radicaux.    Feuilles radicales, celles qui naissent si près de la racine, qu elles semblent en sortir et non de la tige.… …   Dictionnaire de la Langue Française d'Émile Littré

  • radical — RADICÁL, Ă, radicali, e, adj., s.m. I. adj. 1. De bază, fundamental, esenţial. ♦ (Adverbial) Din temelie, cu desăvârşire, complet. ♦ (Despre tratamente, leacuri) Care vindecă în întregime, complet. 2. Care preconizează reforme adânci, acţiuni… …   Dicționar Român

  • Radical — Saltar a navegación, búsqueda El término radical viene del latín radix ( raíz ), significa así de raíz o de base, refiriéndose sobre todo a un punto de vista profundo, sustancial, más aún si es aplicado a alguna convicción, práctica, análisis o… …   Wikipedia Español

  • Radical — Rad i*cal (r[a^]d [i^]*kal), n. 1. (Philol.) (a) A primitive word; a radix, root, or simple, underived, uncompounded word; an etymon. (b) A primitive letter; a letter that belongs to the radix. [1913 Webster] The words we at present make use of,… …   The Collaborative International Dictionary of English

  • radical — adjetivo 1. De la raíz: El morfema radical de amar es am . 2. (antepuesto / pospuesto) Que se produce de manera total, sin ninguna limitación: cambio radical. Las radicales reformas emprendidas por el Ayuntamiento han levantado protestas. Se ha… …   Diccionario Salamanca de la Lengua Española

  • radical — [rad′i kəl] adj. [ME < LL radicalis < L radix (gen. radicis), ROOT1] 1. a) of or from the root or roots; going to the foundation or source of something; fundamental; basic [a radical principle] b) extreme; thorough [a radical change in one… …   English World dictionary

  • radical — (Del lat. radix, īcis, raíz). 1. adj. Perteneciente o relativo a la raíz. 2. Fundamental, de raíz. 3. Partidario de reformas extremas, especialmente en sentido democrático. U. t. c. s.) 4. Extremoso, tajante, intransigente. 5. Bot. Dicho de… …   Diccionario de la lengua española

  • radical — I (extreme) adjective absolute, altogether, complete, comprehensive, entire, exhaustive, intensive, maximal, plenary, sweeping, thorough, thoroughgoing, total, whole II (favoring drastic change) adjective advocating change, fanatical,… …   Law dictionary

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