Radical


Radical
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, and understand only by common agreement, assume a new air and life in the understanding, when you trace them to their radicals, where you find every word strongly stamped with nature; full of energy, meaning, character, painting, and poetry. --Cleland. [1913 Webster]

2. (Politics) One who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; -- opposed to conservative. [1913 Webster]

In politics they [the Independents] were, to use the phrase of their own time, ``Root-and-Branch men,'' or, to use the kindred phrase of our own, Radicals. --Macaulay. [1913 Webster]

3. (Chem.) (a) A characteristic, essential, and fundamental constituent of any compound; hence, sometimes, an atom. [1913 Webster]

As a general rule, the metallic atoms are basic radicals, while the nonmetallic atoms are acid radicals. --J. P. Cooke. [1913 Webster] (b) 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}. [1913 Webster]

4. (Alg.) A radical quantity. See under {Radical}, a. [1913 Webster]

An indicated root of a perfect power of the degree indicated is not a radical but a rational quantity under a radical form. --Davies & Peck (Math. Dict.) [1913 Webster]

5. (Anat.) A radical vessel. See under {Radical}, a. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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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 — 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 — 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 — 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 — 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 2 — meaning vertical stroke is one of six of the 214 Kangxi radicals that are composed of only one stroke.In the Kangxi Dictionary there are only 21 characters (out of 40 000) to be found under this radical.Radical 1 (橫 héng) is one of the Eight… …   Wikipedia