RADIUS

Radius

In classical geometry, the radius of a circle or sphere is the length of a line segment from its center to its perimeter. The name comes from Latin radius, meaning "ray" but also the spoke of a chariot wheel. The plural of radius can be either radii or the conventional English plural radiuses. The typical abbreviation and mathematic variable name for "radius" is r. By extension, the diameter d is defined as twice the radius:

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radius

Noun

  1. The long bone in the forearm, on the side of the thumb.
  2. The lighter bone (or fused portion of bone) in the forelimb of an animal.
  3. A line segment between any point on the circumference of a circle and its center/centre.
  4. The length of this line segment.


The above text is a snippet from Wiktionary: radius
and as such is available under the Creative Commons Attribution/Share-Alike License.

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