radius

FREQ #8345 ★☆☆☆☆

n. 半径, 范围, 辐射光线 [电] 半径

发音

US /ˈɹeɪ.di.əs/

词形变化

radii 复数 radii radiuses radiuses 复数 radiuses 三单 radiusing radiusing 现在分词 radiused 过去式 radiused 过去分词

别名

R

释义与例句

n.
  1. 1.

    The long bone in the forearm, on the side of the thumb.

    医学
  2. 2.

    The lighter bone (or fused portion of bone) in the forelimb of an animal.

    桡骨

    生物 动物学
  3. 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.

    生物 动物学
  4. 4.

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

    数学

    Fatima claims to have visited all the bars within a five-mile radius of her Manhattan apartment.

  5. 5.

    The length of this line segment.

    半径

    数学
  6. 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.

  7. 7.

    The minimum eccentricity of any vertex, for a given graph.

    数学
v.
  1. 1.

    To give a rounded edge to.

    及物

词汇关系

名词

同义词 2

spoke R

上位词 6

part support region length armbone straight line

下位词 2

radius of curvature semidiameter

整体词 5

diameter forearm cartwheel diam wagon wheel

相关短语

radius of curvature [化] 曲率半径 radius vector [化] 径矢; 矢径 radius vectors radius bar radius rod [机] 支杆, 汽车半径杆 radius rods radius bars radius of action [化] 活动半径 radius of gyration [化] 回转半径; 转动半径 radius arm radius arms radius of convergence sight radius hydraulic radius [化] 水力半径 Schwarzschild radius

词源

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

来源：wiktionary