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; 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. [1913 Webster]

The most determined exertions of that authority, against them, only showed their radical independence. --Burke. [1913 Webster]

3. (Bot.) (a) Belonging to, or proceeding from, the root of a plant; as, radical tubers or hairs. (b) 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. [1913 Webster]

4. (Philol.) Relating, or belonging, to the root, or ultimate source of derivation; as, a radical verbal form. [1913 Webster]

5. (Math.) Of or pertaining to a radix or root; as, a radical quantity; a radical sign. See below. [1913 Webster]

{Radical axis of two circles}. (Geom.) See under {Axis}.

{Radical pitch}, the pitch or tone with which the utterance of a syllable begins. --Rush.

{Radical quantity} (Alg.), a quantity to which the radical sign is prefixed; specifically, a quantity which is not a perfect power of the degree indicated by the radical sign; a surd.

{Radical sign} (Math.), the sign [root] (originally the letter r, the initial of radix, root), placed before any quantity, denoting that its root is to be extracted; thus, [root]a, or [root](a + b). To indicate any other than the square root, a corresponding figure is placed over the sign; thus, [cuberoot]a, indicates the third or cube root of a.

{Radical stress} (Elocution), force of utterance falling on the initial part of a syllable or sound.

{Radical vessels} (Anat.), minute vessels which originate in the substance of the tissues. [1913 Webster]

Syn: Primitive; original; natural; underived; fundamental; entire.

Usage: {Radical}, {Entire}. These words are frequently employed as interchangeable in describing some marked alteration in the condition of things. There is, however, an obvious difference between them. A radical cure, reform, etc., is one which goes to the root of the thing in question; and it is entire, in the sense that, by affecting the root, it affects in an appropriate degree the entire body nourished by the root; but it may not be entire in the sense of making a change complete in its nature, as well as in its extent. Hence, we speak of a radical change; a radical improvement; radical differences of opinion; while an entire change, an entire improvement, an entire difference of opinion, might indicate more than was actually intended. A certain change may be both radical and entire, in every sense. [1913 Webster]

The Collaborative International Dictionary of English. 2000.


Look at other dictionaries:

  • 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 — (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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