Radius
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 center of a circle to the periphery; the semidiameter of a circle or sphere. [1913 Webster]

2. (Anat.) The preaxial bone of the forearm, or brachium, corresponding to the tibia of the hind limb. See Illust. of {Artiodactyla}. [1913 Webster]

Note: The radius is on the same side of the limb as the thumb, or pollex, and in man it is so articulated that its lower end is capable of partial rotation about the ulna. [1913 Webster]

3. (Bot.) A ray, or outer floret, of the capitulum of such plants as the sunflower and the daisy. See {Ray}, 2. [1913 Webster]

4. pl. (Zo["o]l.) (a) The barbs of a perfect feather. (b) Radiating organs, or color-markings, of the radiates. [1913 Webster]

5. The movable limb of a sextant or other angular instrument. --Knight. [1913 Webster]

{Radius bar} (Mach.), a bar pivoted at one end, about which it swings, and having its other end attached to a piece which it causes to move in a circular arc.

{Radius of curvature}. See under {Curvature}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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 — 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

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”