radius

noun7

1. •
   A line segment between any point of a circle or sphere and its center.

   • Fatima claims to have visited all the bars within a five-mile radius of her Manhattan apartment.
2. •
   The length of this line segment.
3. •
   The long bone in the forearm, on the side of the thumb.

   • It is also obvious, and proved by experiment, that the rotatory motions observed in the hand proceed from the rotatory motions of the radius. — 1808
4. •
   The lighter bone (or fused portion of bone) in the forelimb of an animal.
5. •
   Anything resembling a radius, such as the spoke of a wheel, the movable arm of a sextant, or one of the radiating lines of a spider's web.
6. •
   The minimum eccentricity of any vertex, for a given graph.
7. •
   One of the major veins of the insect wing, between the subcosta and the media; the vein running along the costal edge of the discal cell.

verb1

1. •
   To give a rounded edge to.

   • A comfortable grip is ensured by smoothing the surface of the handle and radiusing the edge. — 2014

noun1

1. •
   Initialism of Remote Authentication Dial-In User Service.