Radius Definition

rādē-əs
radii, radiuses
noun
radii, radiuses
Any straight line extending from the center to the periphery of a circle or sphere.
Webster's New World
A line segment that joins the center of a sphere with any point on its surface.
American Heritage
A line segment that joins the center of a regular polygon with any of its vertices.
American Heritage
The length of such a line.
Webster's New World
A raylike or radial part, as a spoke of a wheel.
Webster's New World
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other

An Internet protocol used for authentication, authorization, and accounting of end users seeking to gain access to internal computer resources, generally through a network access server (NAS) or, for remote users, by dialing into a remote access server (RAS). Originally developed by Livingston Enterprises, RADIUS was later described by the IETF in RFCs 2058 and 2059 and is currently described in RFCs 2865 and 2866. See also authentication, authorization, IETF, NAS, RAS, and RFC.

Webster's New World Telecom

Other Word Forms of Radius

Noun

Singular:
radius
Plural:
radii, radiuses

Origin of Radius

  • Latin ray, spoke of a wheel, radius

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin radius (“ray")

    From Wiktionary

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