radius


radius
n. & v.
—n. (pl. radii or radiuses)
1 Math. a a straight line from the centre to the circumference of a circle or sphere. b a radial line from the focus to any point of a curve. c the length of the radius of a circle etc.
2 a usu. specified distance from a centre in all directions (within a radius of 20 miles; has a large radius of action).
3 a the thicker and shorter of the two bones in the human forearm (cf. ULNA). b the corresponding bone in a vertebrate's foreleg or a bird's wing.
4 any of the five arm-like structures of a starfish.
5 a any of a set of lines diverging from a point like the radii of a circle. b an object of this kind, e.g. a spoke.
6 a the outer rim of a composite flower-head, e.g. a daisy. b a radiating branch of an umbel.
—v.tr. give a rounded form to (an edge etc.).
Phrases and idioms:
radius vector Math. a variable line drawn from a fixed point to an orbit or other curve, or to any point as an indication of the latter's position.
Etymology: L, = staff, spoke, ray

Useful english dictionary. 2012.

Look at other dictionaries:

  • Radius — Radius …   Deutsch Wörterbuch

  • RADIUS — (Akronym für Remote Authentication Dial In User Service, Authentifizierungsdienst für sich einwählende Benutzer) ist ein Client Server Protokoll, das zur Authentifizierung, Autorisierung und zum Accounting (Triple A System) von Benutzern bei… …   Deutsch Wikipedia

  • radius — [ radjys ] n. m. • 1538; mot lat. « rayon » ♦ Os long, situé à la partie externe de l avant bras, en dehors du cubitus (⇒ radial). ● radius nom masculin (latin radius, rayon) Le plus externe des deux os de l avant bras, articulé avec le cubitus.… …   Encyclopédie Universelle

  • RADIUS — Saltar a navegación, búsqueda RADIUS (acrónimo en inglés de Remote Authentication Dial In User Server). Es un protocolo de autenticación y autorización para aplicaciones de acceso a la red o movilidad IP. Utiliza el puerto 1813 UDP para… …   Wikipedia Español

  • radius — RÁDIUS s.n. Os lung care, împreună cu cubitusul, formează scheletul antebraţului. [pr.: di us] – Din fr., lat. radius. Trimis de RACAI, 22.11.2003. Sursa: DEX 98  rádius s. n. (sil. di us) Trimis de siveco, 10.08.2004. Sursa: Dicţionar… …   Dicționar Român

  • Radius — Ra di*us (r[=a] d[i^]*[u^]s), n.; pl. L. {Radii} (r[=a] d[i^]*[imac]); E. {Radiuses} (r[=a] d[i^]*[u^]s*[e^]z). [L., a staff, rod, spoke of a wheel, radius, ray. See {Ray} a divergent line.] 1. (Geom.) A right line drawn or extending from the… …   The Collaborative International Dictionary of English

  • RADIUS — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Radius peut s utiliser dans différents sens : Radius, un os de l avant bras, nervure radiale, selon le système Comstock Needham de nommage des… …   Wikipédia en Français

  • RADIUS — apud Virgilium, de Conone et Archimede, Ecl. 3. v. 41. In medio duo signa, Conon: et quis fuit alter, Descripsit totum radio qui gentibus orbem: Servio, est virga Philosophorum, quâ Geometra lineas indicant. Inventa autem haec Ars est tempore,… …   Hofmann J. Lexicon universale

  • RADIUS — (acrónimo en inglés de Remote Access Dial In User Server). Es un protocolo de autentificación, autorización y accounting para aplicaciones de acceso a la red o movilidad IP. Cuando se realiza la conexión con un ISP mediante …   Enciclopedia Universal

  • Radius — Sm Halbmesser erw. fach. (15. Jh.) Entlehnung. Entlehnt aus l. radius (eigentlich Stab, Strahl, Speiche ). Adjektiv: radial.    Ebenso ne. radius, nschw. radie, nisl. radíus; Radar, Radiator, Radio. ✎ Schirmer (1912), 59; DF 3 (1977), 117f.;… …   Etymologisches Wörterbuch der deutschen sprache

  • radius — [rā′dē əs] n. pl. radii [rā′dēī΄] or radiuses [L, rod, spoke (of a wheel), hence radius, ray (of light), ? akin to radix,ROOT1] 1. a raylike or radial part, as a spoke of a wheel 2. a) any straight line extending from the center to the periphery… …   English World dictionary


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