| 释义 |
Noun: rad rad- A unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material
- The unit of plane angle adopted under the Système International d'Unités; equal to the angle at the centre of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)
- radian
Derived forms: rads Type of: angular unit, radioactivity unit Encyclopedia: Rad |