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The word radius ( Latin for "wheel spoke"; plural radii, pronounced ray-dee-eye) has several meanings in English:

In classical geometry, a radius of a circle or sphere is any line segment with one endpoint on the circle (i.e., the circular boundary) and the other at the center of the circle. By extension, the radius of a circle or sphere is the length of any such segment.

more generally — in geometry, engineering, graph theory, and many other contexts — the radius of something (e.g. a cylinder, a graph, or a mechanical part) is the distance from its center or axis to its outermost points. See also diameter.

In anatomy, the radius is one of the two bones of the forearmThe forearm is the structure on the upper limb, between the elbow and the wrist. This term is used in anatomy to distinguish it from the arm (or upper arm). The forearm contains two long bones, the radius and the ulna. These bones are connected by the int: see radius (bone)The radius is the bone of the forearm that extends from the inside of the elbow to the thumb side of the wrist. The radius is situated on the lateral side of the ulna, which exceeds it in length and size. Its upper end is small, and forms only a small par.

RADIUSFor the geometric term, see radius and circle. Radius (Remote Authentication Dial In User Service) is an Authentication, Authorization and Accounting ( AAA) protocol for applications such as network access or IP mobility. It is intended to work in both lo is a remote access and dial-in protocolFor the meaning in computer science, see protocol (computing). In addition to the meaning below, treaties are sometimes called protocols. The word derives from a Greek phrase meaning "first leaf", referring to the first draft of a treaty. Protocol is the.
Radius Fidonet mailer is an Argus successor.

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Topics: Radius Of Gyration, Radius Of Convergence, Radius (bone)...

RadiusThe word radius ( Latin for "wheel spoke"; plural radii pronounced ray dee-eye has several meanings in English: In classical geometry, a radius of a circle or sphere is any line segment with one endpoint on the circle (i. the circular boundary) and the ot	Radius of gyrationThe radius of gyration of an area with respect to a particular axis is the square root of the quotient of the moment of inertia divided by the area. It is the distance at which the entire area must be assumed to be concentrated in order that the product o	Radius of convergenceCalculus Complex analysis In mathematics, the radius of convergence of a power series : where the center a and the coefficients c are complex numbers (which may, in particular, be real numbers) is the nonnegative quantity r (which may be a real number or
RADIUSFor the geometric term, see radius and circle. Radius (Remote Authentication Dial In User Service) is an Authentication, Authorization and Accounting ( AAA) protocol for applications such as network access or IP mobility. It is intended to work in both lo	Radius (bone)The radius is the bone of the forearm that extends from the inside of the elbow to the thumb side of the wrist. The radius is situated on the lateral side of the ulna, which exceeds it in length and size. Its upper end is small, and forms only a small par

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