radiusnoun/ˈɹeɪ.di.əs/

• 1

  anatomymedicinesciencesThe 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.
• 2

  biologynatural-scienceszoologyThe lighter bone (or fused portion of bone) in the forelimb of an animal.

• 3

  biologyentomologynatural-sciencesOne 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.

• 4

  geometrymathematicssciencesA 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.
  • We start with spherical geometries. The two geometries on spheres of radiuses R₁ and R₂ are obviously identical if R₁ = R₂; moreover, the converse also holds.
• 5

  geometrymathematicssciencesThe length of this line segment.

  • This contribution reduces with increasing distance p from the emitting surface element dA, due to conservation of energy, as the wave energy distributed across the spherical wave front remains constant, while the radius increases during ...
• 6

  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.

  • […] I can do more with a Quadrant, Sextant or Octant, of 1 foot Radius, furniſhed with Teleſcopical Sights and Screws, then ^([sic]) can poſſibly be done with any other Inſtrument, furniſhed only with Common Sights, though 10, 20, 30, nay threeſcore foot Radius; […]
• 7

  graph-theorymathematicssciencesThe minimum eccentricity of any vertex, for a given graph.

radiusverb/ˈɹeɪ.di.əs/

• 1

  To give a rounded edge to.

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