radius

名词 n. 动词 v.
中文释义
发音 rā'-dē-əs

英文释义

名词 n.
  1. 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.
  2. The lighter bone (or fused portion of bone) in the forelimb of an animal.
  3. 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.
  4. 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.
  5. 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 ...
  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. The minimum eccentricity of any vertex, for a given graph.
动词 v.
  1. To give a rounded edge to. transitive
    — A comfortable grip is ensured by smoothing the surface of the handle and radiusing the edge.

词形变化

radii plural radiuses plural radiuses present,singular,third-person radiusing participle,present radiused participle,past radiused past

词汇关系

衍生词
atomic radius blast radius Bohr radius circumradius covalent radius Debye radius distal radius Earth radius Einstein radius equiradiate exradius gyradius gyroradius Hill radius hydraulic radius hyperradius inradius interradius ionic radius metallic radius potato radius radian radion radius arm radius bar radius of action radius of convergence radius of curvature radius of gyration radius rod radius vector Roche radius Schwarzschild radius sight radius triradius van der Waals radius
相关词
radial radiad radiate radiation

词源

词源 1
Borrowed from Latin radius (“ray”). Doublet of ray.
词源 2
Borrowed from Latin radius (“ray”). Doublet of ray.
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