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) An authentication, authorization and accounting (AAA) protocol developed by Livingston Enterprises (later acquired by Lucent). RADIUS uses a challenge/response method for authentication and has been widely used prior to Diameter. See Diameter, network access server and challenge/response.
References in periodicals archive ?
Curve radius is 931 m, permissible passenger train speed - 120 km/h, freight train speed - 90 km/h and actual superelevation - 60 mm.
1:p of new wheels equals to 1:20, and 1:p reaches 1:100, 1:200 and even more as wheels wear; [rho] is the radius of the wheel rolling circle, R--the curve radius, c--distance between side edge of rail head to axis, a--the distance between internal wheel pair flanges at altitude of where gauge width is measured and b--the flange thickness at altitude in the place where gauge width is measured.
In case of railway transport, this criterion has two marginal values: curve radius is acceptable and reconstructions are not necessary or are inadequate (i.
Features on analyzed roadway segments width travel lanes plus shoulders, m curve radius radius of the horizontal curve, m preceding curve radius radius of the horizontal curve preceding surveyed roadway geometric element, m preceding tangent length length of the tangent segment preceding surveyed roadway geometric element, m CCR of homogeneous segment curvature change rate of an homogeneous roadway segment, gon/km CCRs of preceding curve curvature change rate of a single curve preceding surveyed geometric segment, gon/km tangent and curve length length of single geometric element, m [V.
Locomotive must be compatible for use in the following ways: (1) yard switching with track curve radius of up to 21A and (2) mainline freight hauling in all weather conditions