radius
noun
- one of the two long bones of the forearm
- segment in a circle or sphere (from its center to its perimeter or surface) and its length
Wiktionary
Pronunciation: /ˈɹeɪ.di.əs/
noun
Etymology: Borrowed from Latin radius (“ray”). Doublet of ray.
- 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.”
- The lighter bone (or fused portion of bone) in the forelimb of an animal.
- 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.
- 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.”
“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.”
- The 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 ...”
- 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; […]”
- The minimum eccentricity of any vertex, for a given graph.
verb
Etymology: Borrowed from Latin radius (“ray”). Doublet of ray.
- To give a rounded edge to.
“A comfortable grip is ensured by smoothing the surface of the handle and radiusing the edge.”