(Learning Modules / Mathematics / Gravity) The shortest distance from the centre of a circle to a point on the circumference.

Remote Authentication Dial In User Service (RADIUS) is a networking protocol that provides centralized Authentication, Authorization, and Accounting (AAA) management for users that connect and use a network service. RADIUS was developed by Livingston Enterprises, Inc. in 1991 as an access server authentication and accounting protocol and later bro...

• (n.) The preaxial bone of the forearm, or brachium, corresponding to the tibia of the hind limb. See Illust. of Artiodactyla. • (n.) The barbs of a perfect feather. • (n.) A right line drawn or extending from the center of a circle to the periphery; the semidiameter of a circle or sphere. • (n.) The movable limb of a sextant o...

(from the article `mechanics`) Consider a coordinate system, as shown in Figure 8A, with the circle centred at the origin. At any instant of time, the position of the particle may ... ...(Parallax is the apparent displacement of an object when viewed from different vantage points). Hipparchus thus calculated that the mean distance ... ...
Found on http://www.britannica.com/eb/a-z/r/4

(In topic `Security`) RADIUS (Remote Authentication Dial-In User Service) is an Internet security authentication protocol, based on the challenge-response method, that was developed by the IETF and is used widely by many ISP`s. The RADIUS protocol carries a dial-in users` authentication, authorisation & configuration information.Â Â
Found on http://www.encyclo.co.uk/local/20477

(ra´de-әs) a line radiating from a center, or a circular limit defined by a fixed distance from an established point or center. in anatomy, the bone on the outer or thumb side of the forearm. grid radius grid focus.
Found on http://www.encyclo.co.uk/local/21001

r noun the length of a line segment between the center and circumference of a circle or sphere
Found on https://www.encyclo.co.uk/local/20974

(arm) The smaller of the two bones of the forearm, extending from the elbow to the wrist. The radius rotates around the ulna, the other forearm bone, permitting the hand to rotate and be flexible. A projection just above the thumb side of the wrist marks the end of the radi...

(mathematics) Straight line from the centre of a circle to its circumference, or from the centre to the surface of a sphere
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0036064.html

[bone] The radius or radial bone is one of the two large bones of the forearm, the other being the ulna. It extends from the lateral side of the elbow to the thumb side of the wrist and runs parallel to the ulna, which exceeds it in length and size. It is a long bone, prism-shaped and slightly curved longitudinally. The radius articulates w...

[company] Radius is a software company that provides a marketing platform for targeting small businesses. The company tracks and collects information from hundreds of thousands of sources about more than 25 million small businesses in the United States. The company has publicly stated it plans to build products that are directly competitive...

[computer] Radius was an American computer hardware firm founded in May 1986 by Burrell Smith, Andy Hertzfeld, Mike Boich, Matt Carter, Alain Rossmann and other members of the original Mac team. The company specialized in Macintosh peripherals and accessory equipment. Their products ranged from processor upgrade cards (Radius Accelerator) b...

[Noun] The distance in any direction from a certain point. In maths, the radius is the distance from the centre of a circle to the circumference, or edge, of the circle.
Example: The chances of the missile reaching its target were slim, but they predicted that it would land within a half-mile radius.
Found on http://www.bbc.co.uk/skillswise/glossary/

[travel] Radius Travel is a privately held corporate travel management company with offices in Bethesda, Maryland, USA, London, and Singapore, that designs custom global travel management solutions{clarify|date=August 2013} for multinational companies. It is composed of 90 corporate travel agencies operating in 80 countries and in over 3,30...

Ra'di·us (rā'dĭ*ŭs) noun ; plural Latin Radii (- ī); English Radiuses (-ŭs*ĕz). [ Latin , a staff, rod, spoke of a wheel, radius, ray. See Ray a divergent line.] 1. (Geom.) A right line drawn or extending from the cen...
Found on http://www.encyclo.co.uk/webster/R/5

A bone of the forearm.
Found on https://www.ioshospital.com/orthopaedics/learnMore/glossaryOfTerms.aspx

A line segment with one endpoint at the center of a circle and the other endpoint on the circle
Example:

Found on http://www.hbschool.com/glossary/math2/index6.html

As a verb - To apply a Fillet
Found on http://www.vutrax.co.uk/glossary.htm

Forearm bone on the thumb side.
Found on http://www.encyclo.co.uk/local/20906

Half the diameter of any sphere or circle.
Found on http://www.moonconnection.com/moon-glossary.phtml

In a circle, the radius is the distance from the centre of the circle to a point on the circle. See also: Circle, Diameter.

in anatomy, the outer of the two bones of the forearm when viewed with the palm facing forward. All land vertebrates have this bone. In humans it is ... [6 related articles]
Found on http://www.britannica.com/eb/a-z/r/4

Latin = spoke of a wheel, which rotates around the hub; hence, the lateral bone of the forearm, which rotates (though around an almost vertical axis); adjective - radial.
Found on http://www.anatomy.usyd.edu.au/glossary/glossary.cgi?

one of the bones in the wing extending from the write to the elbow
Found on http://www.encyclo.co.uk/local/22220

One of the main longitudinal veins, running near the front of the wing and usually the 3rd and abbreviated to R
Found on http://www.earthlife.net/insects/glossary.html
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