radius
n
(pl -dii )
1 (length of a) straight line from the centre of a circle or sphere to any point on its circumference or surface 半径(距离). =>App 5 见附录 5. =>illus at circle 见circle插图.
2 circular area measured by its radius 用半径度量的圆形面积; 半径范围
Police searched all the woods within a six-mile radius/within a radius of six miles. 警方搜索了在周围六英里以内的树林各处.
3 (anatomy 解) outer shorter bone in the human forearm; corresponding bone in an animal's foreleg or a bird's wing (人与兽的)桡骨; 鸟翼中相当於桡骨的骨. =>illus at skeleton 见skeleton插图. Cf 参看 ulna.
🎯 考研助记
收音机(radio)的 半径有美国(us)那么大
🔁 扩展释义
*['reidiәs]n. 半径, 范围, 辐射光线【电】 半径
🏥 医学释义
①桡骨 ②半径
🌿 同词根单词
radion. 无线电;收音机;无线电广播台;无线电收发报机;
vt.& vi. 用无线电发送讯息;作无线电广播;用X射线拍照;