柯林斯词典rad /ræd/ 1. N a former unit of absorbed ionizing radiation dose equivalent to an energy absorption per unit mass of 0.01 joule per kilogram of irradiated material. 1 rad is equivalent to 0.01 gray 拉德(吸收辐射剂量单位)rad N 1. SYMBOL for radian 弧度 返回 rad剑桥词典extremely exciting or good 极其刺激的；特棒的 a rad new computer game 非常刺激的新电脑游戏 返回 rad