rad.

汉语翻译

英语解释：

名词 rad.:

1. a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material
   同义词：rad
2. 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)
   同义词：radian, rad

详细解释：