radian
/'reidiәn/
📖 中文释义
- n. 弧度
- [计] 弧度
🔗 释义中的汉语词
🧩 词形变化
复数 radians
📘 English Definition（英文释义）
- n. the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)