radius

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radius,

in anatomy: see armarm,
upper limb in humans. Three long bones form the framework of the arm: the humerus of the upper arm, and the radius (outer bone) and ulna (inner bone) of the forearm.
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radius

[′rād·ē·əs]
(anatomy)
The outer of the two bones of the human forearm or of the corresponding part in vertebrates other than fish.
(mathematics)
A line segment joining the center and a point of a circle or sphere.
The length of such a line segment.

radius

1. a straight line joining the centre of a circle or sphere to any point on the circumference or surface
2. the length of this line, usually denoted by the symbol r
3. the distance from the centre of a regular polygon to a vertex (long radius) or the perpendicular distance to a side (short radius)
4. Anatomy the outer and slightly shorter of the two bones of the human forearm, extending from the elbow to the wrist
5. a corresponding bone in other vertebrates
6. any of the veins of an insect's wing
7. a group of ray florets, occurring in such plants as the daisy
8. the lateral displacement of a cam or eccentric wheel

RADIUS

Remote Authentication Dial-In User Service

RADIUS

(Remote Authentication Dial-In User Service) The de facto standard protocol for authentication servers (AAA servers). Developed by Livingston Enterprises (later acquired by Lucent), RADIUS uses a challenge/response method for authentication. See authentication server and challenge/response.
References in periodicals archive ?
Using topographical navigation data such as uphill and downhill gradients and curve radii, the innovative Bosch system is able to determine which sections of the route are suitable for recovering braking energy.
Logic motion this is a new type of assistance system from Bosch, whereby the focus is on optimized engine and transmission control on the basis of such expanded navigation data as up-/downhill stretches and curve radii.